Merge into the DimensionOp

Docker/ubuntu-16.04-cpu-openblas/Dockerfile

@@ -18,7 +18,7 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
     python3-tk \ 
     python3-tk \ 
     && rm -rf /var/lib/apt/lists/*
     && rm -rf /var/lib/apt/lists/*
 
 
-RUN pip3 install --no-cache-dir --upgrade setuptools wheel && \
+RUN pip3 install --no-cache-dir --upgrade setuptools wheel -i https://pypi.tuna.tsinghua.edu.cn/simple && \
     pip3 install --no-cache-dir -i https://pypi.tuna.tsinghua.edu.cn/simple \
     pip3 install --no-cache-dir -i https://pypi.tuna.tsinghua.edu.cn/simple \
     numpy \
     numpy \
     protobuf \
     protobuf \
@@ -27,6 +27,7 @@ RUN pip3 install --no-cache-dir --upgrade setuptools wheel && \
     six \ 
     six \ 
     Pillow
     Pillow
     matplotlib \
     matplotlib \
+    scikit-image \
     pyyaml \
     pyyaml \
     cython
     cython
 
 

Docker/ubuntu-16.04-cuda9.0-cudnn7/Dockerfile

@@ -21,7 +21,7 @@ RUN rm /etc/apt/sources.list.d/cuda.list && rm /etc/apt/sources.list.d/nvidia-ml
     python3-tk \
     python3-tk \
     && rm -rf /var/lib/apt/lists/*
     && rm -rf /var/lib/apt/lists/*
 
 
-RUN pip3 install --no-cache-dir --upgrade setuptools wheel && \
+RUN pip3 install --no-cache-dir --upgrade setuptools wheel -i https://pypi.tuna.tsinghua.edu.cn/simple && \
     pip3 install --no-cache-dir -i https://pypi.tuna.tsinghua.edu.cn/simple \
     pip3 install --no-cache-dir -i https://pypi.tuna.tsinghua.edu.cn/simple \
     numpy \
     numpy \
     protobuf \ 
     protobuf \ 
@@ -30,6 +30,7 @@ RUN pip3 install --no-cache-dir --upgrade setuptools wheel && \
     six \ 
     six \ 
     Pillow \
     Pillow \
     matplotlib \
     matplotlib \
+    scikit-image \
     pyyaml \
     pyyaml \
     cython
     cython
 
 

Dragon/include/core/common.h

@@ -52,9 +52,9 @@ using Set = std::unordered_set<Value> ;
 /*
 /*
  * Define the Kernel version.
  * Define the Kernel version.
  *
  *
- * | Major(2) | Minor(2) | Patch(09) |
+ * | Major(2) | Minor(2) | Patch(10) |
  */
  */
-#define DRAGON_VERSION 2209
+#define DRAGON_VERSION 2210
 
 
 /*
 /*
  * Define the default random seed.
  * Define the default random seed.

Dragon/include/core/operator.h

@@ -114,7 +114,7 @@ class Operator : public OperatorBase {
     virtual void MakeResource();
     virtual void MakeResource();
     virtual void CleanResource();
     virtual void CleanResource();
 
 
-    void MemorySwitch() {
+    virtual void MemorySwitch() {
         for (auto* I : inputs_)
         for (auto* I : inputs_)
             if(I->name() != "ignore") I->SwitchToDevice();
             if(I->name() != "ignore") I->SwitchToDevice();
         for (auto* O : outputs_) 
         for (auto* O : outputs_) 

Dragon/include/core/tensor.h

@@ -40,7 +40,8 @@ class Tensor {
                 capacity_ = 0;
                 capacity_ = 0;
             }
             }
         } else {
         } else {
-            if (ex_memory_ && TIndex(ex_memory_->nbytes()) <
+            if (ex_memory_ && !is_shared_ && 
+                    TIndex(ex_memory_->nbytes()) <
                         TIndex(new_size * meta_.itemsize())) {
                         TIndex(new_size * meta_.itemsize())) {
                 delete ex_memory_;
                 delete ex_memory_;
                 ex_memory_ = nullptr;
                 ex_memory_ = nullptr;
@@ -232,18 +233,18 @@ class Tensor {
         return static_cast<const T*>(raw_data<Context>());
         return static_cast<const T*>(raw_data<Context>());
     }
     }
 
 
-    template <class DstCTX, class SrcCTX>
-    inline void Copy(const Tensor& other) {
+    template <class Context>
+    inline void CopyFrom(const Tensor& other) {
         CHECK_EQ(size_, other.size_);
         CHECK_EQ(size_, other.size_);
-        auto* src = other.template raw_data<SrcCTX>();
-        auto* dst = raw_mutable_data<DstCTX>(other.meta_);
+        auto* src = other.template raw_data<Context>();
+        auto* dst = raw_mutable_data<Context>(other.meta_);
         if (dst == src) return;
         if (dst == src) return;
-        if (TypeMeta::Id<DstCTX>() ==
+        if (TypeMeta::Id<Context>() ==
                 TypeMeta::Id<CPUContext>()) {
                 TypeMeta::Id<CPUContext>()) {
-            CPUContext::Memcpy<DstCTX, SrcCTX>(nbytes(), dst, src);
-        } else if (TypeMeta::Id<DstCTX>() == 
+            CPUContext::Memcpy<Context, Context>(nbytes(), dst, src);
+        } else if (TypeMeta::Id<Context>() ==
                 TypeMeta::Id<CUDAContext>()) {
                 TypeMeta::Id<CUDAContext>()) {
-            CUDAContext::Memcpy<DstCTX, SrcCTX>(nbytes(), dst, src);
+            CUDAContext::Memcpy<Context, Context>(nbytes(), dst, src);
         }
         }
     }
     }
 
 
@@ -253,6 +254,8 @@ class Tensor {
         own_mem_ = false;
         own_mem_ = false;
     }
     }
 
 
+    inline void Share(MixedMemory* mem) { Move(mem); is_shared_ = true; }
+
     inline void Reset() {
     inline void Reset() {
         size_ = capacity_ = 0;
         size_ = capacity_ = 0;
         meta_ = TypeMeta();
         meta_ = TypeMeta();
@@ -271,7 +274,8 @@ class Tensor {
     string name_;
     string name_;
     shared_ptr<MixedMemory> memory_;
     shared_ptr<MixedMemory> memory_;
     MixedMemory* ex_memory_ = nullptr;
     MixedMemory* ex_memory_ = nullptr;
-    bool is_corrupted_ = false, own_mem_ = true;
+    bool is_corrupted_ = false, is_shared_ = false;
+    bool own_mem_ = true;
 };
 };
 
 
 }    // namespace dragon
 }    // namespace dragon

Dragon/include/core/types.h

@@ -49,7 +49,8 @@ inline const TypeMeta& TypeStringToMeta(
             { "int64", TypeMeta::Make<int64_t>() },
             { "int64", TypeMeta::Make<int64_t>() },
             { "float64", TypeMeta::Make<double>() },
             { "float64", TypeMeta::Make<double>() },
             { "float16", TypeMeta::Make<float16>() },
             { "float16", TypeMeta::Make<float16>() },
-            { "uint8", TypeMeta::Make<uint8_t>() } 
+            { "uint8", TypeMeta::Make<uint8_t>() },
+            { "int8", TypeMeta::Make<char>() },
     };
     };
     static TypeMeta unknown_type;
     static TypeMeta unknown_type;
     return s2m_type_map.count(str_type) ?
     return s2m_type_map.count(str_type) ?
@@ -65,7 +66,8 @@ inline const std::string TypeMetaToString(
             { TypeMeta::Id<int64_t>(), "int64" },
             { TypeMeta::Id<int64_t>(), "int64" },
             { TypeMeta::Id<double>(), "float64", },
             { TypeMeta::Id<double>(), "float64", },
             { TypeMeta::Id<float16>(), "float16" },
             { TypeMeta::Id<float16>(), "float16" },
-            { TypeMeta::Id<uint8_t>(), "uint8" } 
+            { TypeMeta::Id<uint8_t>(), "uint8" },
+            { TypeMeta::Id<char>(), "int8" }
     };
     };
     return m2s_type_map.count(meta.id()) ?
     return m2s_type_map.count(meta.id()) ?
         m2s_type_map[meta.id()] : "unknown";
         m2s_type_map[meta.id()] : "unknown";

Dragon/include/operators/ndarray/dimension_op.h

+// ------------------------------------------------------------
+// Copyright (c) 2017-present, SeetaTech, Co.,Ltd.
+//
+// Licensed under the BSD 2-Clause License.
+// You should have received a copy of the BSD 2-Clause License
+// along with the software. If not, See,
+//
+//      <https://opensource.org/licenses/BSD-2-Clause>
+//
+// -------------------------------------------------------------
+
+#ifndef DRAGON_OPERATORS_NDARRAY_DIMENSION_OP_H_
+#define DRAGON_OPERATORS_NDARRAY_DIMENSION_OP_H_
+
+#include "core/operator.h"
+
+namespace dragon {
+
+/*********************************************
+*                                            *
+*                   Base                     *
+*                                            *
+**********************************************/
+
+template <class Context>
+class DimOpBase : public Operator<Context> {
+ public:
+    USE_SIMPLE_CTOR_DTOR(DimOpBase);
+
+    void MemorySwitch() override {
+        /* Disable the Memory Activation */
+    }
+};
+
+template <class Context>
+class DimGradientOpBase : public Operator<Context> {
+public:
+    USE_SIMPLE_CTOR_DTOR(DimGradientOpBase);
+    USE_OPERATOR_FUNCTIONS;
+
+    void RunOnDevice() override {
+        //  simply copy the dY to dX
+        Output(0)->ReshapeLike(Input(0));
+        if (Output(0)->name() != Input(-1).name())
+            Output(0)->template CopyFrom<Context>(Input(-1));
+    }
+};
+
+#define DEFINE_DIMENSION_GRADIENT_OP(name) \
+    template <class Context> \
+    class name##GradientOp final : public DimGradientOpBase<Context> { \
+     public: \
+      name##GradientOp(const OperatorDef& def, Workspace* ws) \
+        : DimGradientOpBase<Context>(def, ws) {} \
+    };
+
+/*********************************************
+*                                            *
+*                   Reshape                  *
+*                                            *
+**********************************************/
+
+template <class Context>
+class ReshapeOp final : public DimOpBase<Context> {
+ public:
+    ReshapeOp(const OperatorDef& def, Workspace* ws)
+        : DimOpBase<Context>(def, ws),
+          shape_like_desc(OperatorBase::Arg<string>("shape_like", "")) {
+        GET_ARGUMENTS_WITH_DESC(int, shape);
+    }
+    USE_OPERATOR_FUNCTIONS;
+
+    void RunOnDevice() override;
+
+ protected:
+    DECLARE_ARGUMENTS_WITH_DESC(int, shape);
+    string shape_like_desc;
+    vector<TIndex> require_shape, new_shape;
+};
+
+DEFINE_ARGUMENTS_WITH_DESC(int, ReshapeOp, shape);
+DEFINE_DIMENSION_GRADIENT_OP(Reshape);
+
+/*********************************************
+*                                            *
+*                   Flatten                  *
+*                                            *
+**********************************************/
+
+template <class Context>
+class FlattenOp final : public DimOpBase<Context> {
+ public:
+    FlattenOp(const OperatorDef& def, Workspace* ws)
+        : DimOpBase<Context>(def, ws),
+          axis(OperatorBase::Arg<int>("axis", 0)),
+          num_axes(OperatorBase::Arg<int>("num_axes", -1)),
+          keep_axes(OperatorBase::Arg<int>("keep_axes", INT_MAX)) {}
+    USE_OPERATOR_FUNCTIONS;
+
+    void RunOnDevice() override;
+
+ protected:
+    TIndex axis, num_axes, keep_axes;
+};
+
+DEFINE_DIMENSION_GRADIENT_OP(Flatten);
+
+/*********************************************
+*                                            *
+*                Expand Dims                 *
+*                                            *
+**********************************************/
+
+template <class Context>
+class ExpandDimsOp final : public DimOpBase<Context> {
+ public:
+    ExpandDimsOp(const OperatorDef& def, Workspace* ws)
+        : DimOpBase<Context>(def, ws),
+          axis(OperatorBase::Arg<int>("axis", INT_MAX)) {
+        if (axis == INT_MAX)
+            LOG(FATAL) << "Excepted a axis to insert the new dim.";
+    }
+    USE_OPERATOR_FUNCTIONS;
+
+    void RunOnDevice() override;
+
+ protected:
+    TIndex axis;
+};
+
+DEFINE_DIMENSION_GRADIENT_OP(ExpandDims);
+
+/*********************************************
+*                                            *
+*                  Squeeze                   *
+*                                            *
+**********************************************/
+
+template <class Context>
+class SqueezeOp final : public DimOpBase<Context> {
+public:
+    SqueezeOp(const OperatorDef& def, Workspace* ws)
+        : DimOpBase<Context>(def, ws),
+        axis(OperatorBase::Arg<int>("axis", INT_MAX)) {}
+    USE_OPERATOR_FUNCTIONS;
+
+    void RunOnDevice() override;
+
+ protected:
+    TIndex axis;
+};
+
+DEFINE_DIMENSION_GRADIENT_OP(Squeeze);
+
+}    // namespace dragon
+
+#endif    // DRAGON_OPERATORS_NDARRAY_RESHAPE_OP_H_
\ No newline at end of file

Dragon/include/operators/ndarray/expand_dims_op.h

-// ------------------------------------------------------------
-// Copyright (c) 2017-present, SeetaTech, Co.,Ltd.
-//
-// Licensed under the BSD 2-Clause License.
-// You should have received a copy of the BSD 2-Clause License
-// along with the software. If not, See,
-//
-//      <https://opensource.org/licenses/BSD-2-Clause>
-//
-// -------------------------------------------------------------
-
-#ifndef DRAGON_OPERATORS_NDARRAY_EXPAND_DIMS_OP_H_
-#define DRAGON_OPERATORS_NDARRAY_EXPAND_DIMS_OP_H_
-
-#include "core/operator.h"
-
-namespace dragon {
-
-template <class Context>
-class ExpandDimsOp final : public Operator<Context> {
- public:
-    ExpandDimsOp(const OperatorDef& def, Workspace* ws)
-        : Operator<Context>(def, ws),
-          axis(OperatorBase::Arg<int>("axis", -1)) {}
-    USE_OPERATOR_FUNCTIONS;
-
-    void RunOnDevice() override;
-
- protected:
-    TIndex axis;
-};
-
-template <class Context>
-class ExpandDimsGradientOp final : public Operator<Context> {
- public:
-    USE_SIMPLE_CTOR_DTOR(ExpandDimsGradientOp);
-    USE_OPERATOR_FUNCTIONS;
-
-    void RunOnDevice() override;
-};
-
-}    // namespace dragon
-
-#endif    // DRAGON_OPERATORS_NDARRAY_EXPAND_DIMS_OP_H_
\ No newline at end of file

Dragon/include/operators/ndarray/flatten_op.h

-// ------------------------------------------------------------
-// Copyright (c) 2017-present, SeetaTech, Co.,Ltd.
-//
-// Licensed under the BSD 2-Clause License.
-// You should have received a copy of the BSD 2-Clause License
-// along with the software. If not, See,
-//
-//      <https://opensource.org/licenses/BSD-2-Clause>
-//
-// -------------------------------------------------------------
-
-#ifndef DRAGON_OPERATORS_NDARRAY_FLATTEN_OP_H_
-#define DRAGON_OPERATORS_NDARRAY_FLATTEN_OP_H_
-
-#include "core/operator.h"
-
-namespace dragon {
-
-template <class Context>
-class FlattenOp final : public Operator<Context> {
- public:
-    FlattenOp(const OperatorDef& def, Workspace* ws)
-        : Operator<Context>(def, ws),
-          axis(OperatorBase::Arg<int>("axis", 0)),
-          num_axes(OperatorBase::Arg<int>("num_axes", -1)),
-          keep_axes(OperatorBase::Arg<int>("keep_axes", INT_MAX)) {}
-    USE_OPERATOR_FUNCTIONS;
-
-    void RunOnDevice() override;
-    void SqueezeRun();
-    void KeepRun();
-
- protected:
-    TIndex axis, num_axes, keep_axes;
-};
-
-template <class Context>
-class FlattenGradientOp final : public Operator<Context> {
- public:
-    USE_SIMPLE_CTOR_DTOR(FlattenGradientOp);
-    USE_OPERATOR_FUNCTIONS;
-
-    void RunOnDevice() override;
-};
-
-}    // namespace dragon
-
-#endif    // DRAGON_OPERATORS_NDARRAY_FLATTEN_OP_H_
\ No newline at end of file

Dragon/include/operators/ndarray/reshape_op.h

-// ------------------------------------------------------------
-// Copyright (c) 2017-present, SeetaTech, Co.,Ltd.
-//
-// Licensed under the BSD 2-Clause License.
-// You should have received a copy of the BSD 2-Clause License
-// along with the software. If not, See,
-//
-//      <https://opensource.org/licenses/BSD-2-Clause>
-//
-// -------------------------------------------------------------
-
-#ifndef DRAGON_OPERATORS_NDARRAY_RESHAPE_OP_H_
-#define DRAGON_OPERATORS_NDARRAY_RESHAPE_OP_H_
-
-#include "core/operator.h"
-
-namespace dragon {
-
-template <class Context>
-class ReshapeOp final : public Operator<Context> {
- public:
-    ReshapeOp(const OperatorDef& def, Workspace* ws)
-        : Operator<Context>(def, ws),
-          shape_like_desc(OperatorBase::Arg<string>("shape_like", "")) {
-        GET_ARGUMENTS_WITH_DESC(int, shape);
-    }
-    USE_OPERATOR_FUNCTIONS;
-
-    void RunOnDevice() override;
-
- protected:
-    DECLARE_ARGUMENTS_WITH_DESC(int, shape);
-    string shape_like_desc;
-    vector<TIndex> require_shape, new_shape;
-};
-
-template <class Context>
-class ReshapeGradientOp final : public Operator<Context> {
- public:
-    USE_SIMPLE_CTOR_DTOR(ReshapeGradientOp);
-    USE_OPERATOR_FUNCTIONS;
-
-    void RunOnDevice() override;
-};
-
-DEFINE_ARGUMENTS_WITH_DESC(int, ReshapeOp, shape);
-
-}    // namespace dragon
-
-#endif    // DRAGON_OPERATORS_NDARRAY_RESHAPE_OP_H_
\ No newline at end of file

Dragon/include/operators/vision/conv_op_base.h

@@ -55,7 +55,7 @@ class ConvOpBase : public Operator<Context> {
     void GradientReshape();
     void GradientReshape();
     virtual void ComputeOutputShape();
     virtual void ComputeOutputShape();
     virtual bool ReverseDimensions() = 0;
     virtual bool ReverseDimensions() = 0;
-    virtual bool HasBias() = 0;
+    virtual bool HasBias() { NOT_IMPLEMENTED; return true; }
 
 
     template <typename T> void Wx(const T* x,
     template <typename T> void Wx(const T* x,
         const T* weights, T* y, bool skip_im2col = false);
         const T* weights, T* y, bool skip_im2col = false);

Dragon/modules/cxx/device.cc

@@ -16,12 +16,12 @@ int type_from_string(std::string type) {
 }
 }
 
 
 Device::Device()
 Device::Device()
-    : device_type_(CPU), device_id_(0) {}
+    : device_type_(0), device_id_(0) {}
 
 
 Device::Device(std::string device_type, int device_id)
 Device::Device(std::string device_type, int device_id)
-    : device_type_((DeviceType)type_from_string(device_type)), device_id_(device_id) {}
+    : device_type_(type_from_string(device_type)), device_id_(device_id) {}
 
 
 Device::Device(std::string device_type)
 Device::Device(std::string device_type)
-    : device_type_((DeviceType)type_from_string(device_type)), device_id_(0) {}
+    : device_type_(type_from_string(device_type)), device_id_(0) {}
 
 
 }    // namespace dragon
 }    // namespace dragon
\ No newline at end of file

Dragon/modules/cxx/dragon.cc

@@ -6,7 +6,6 @@
 #include <google/protobuf/io/zero_copy_stream_impl.h>
 #include <google/protobuf/io/zero_copy_stream_impl.h>
 
 
 #include "dragon.h"
 #include "dragon.h"
-#include "protos/dragon.pb.h"
 #include "core/common.h"
 #include "core/common.h"
 #include "core/workspace.h"
 #include "core/workspace.h"
 #include "utils/caffemodel.h"
 #include "utils/caffemodel.h"
@@ -35,7 +34,8 @@ Workspace* ResetWorkspace(const std::string& name) {
     g_workspaces[name].reset(new Workspace(name));
     g_workspaces[name].reset(new Workspace(name));
     for (auto& sub_workspace : sub_workspaces[name]) {
     for (auto& sub_workspace : sub_workspaces[name]) {
         if (g_workspaces.count(sub_workspace) > 0)
         if (g_workspaces.count(sub_workspace) > 0)
-            g_workspaces[name]->MoveWorkspace(g_workspaces[sub_workspace].get());
+            g_workspaces[name]->MoveWorkspace(
+                g_workspaces[sub_workspace].get());
     }
     }
     return g_workspaces[name].get();
     return g_workspaces[name].get();
 }
 }
@@ -49,7 +49,9 @@ void ReleaseWorkspace(const std::string& name) {
     g_workspaces.erase(name);
     g_workspaces.erase(name);
 }
 }
 
 
-void MoveWorkspace(Workspace* target_ws, Workspace* source_ws) {
+void MoveWorkspace(
+    Workspace*                  target_ws,
+    Workspace*                  source_ws) {
     std::unique_lock<std::mutex> lock(g_mutex);
     std::unique_lock<std::mutex> lock(g_mutex);
     CHECK(source_ws) << "\nThe given source workspace is invalid."; 
     CHECK(source_ws) << "\nThe given source workspace is invalid."; 
     CHECK(target_ws) << "\nThe given target workspace is invalid.";
     CHECK(target_ws) << "\nThe given target workspace is invalid.";
@@ -59,7 +61,9 @@ void MoveWorkspace(Workspace* target_ws, Workspace* source_ws) {
               << "into the Workspace(" << target_ws->name() << ").";
               << "into the Workspace(" << target_ws->name() << ").";
 }
 }
 
 
-std::string CreateGraph(const std::string& graph_file, Workspace* ws) {
+std::string CreateGraph(
+    const std::string&          graph_file,
+    Workspace*                  ws) {
     GraphDef meta_graph;
     GraphDef meta_graph;
     int fd = open(graph_file.c_str(), O_RDONLY);
     int fd = open(graph_file.c_str(), O_RDONLY);
     CHECK_NE(fd, -1) << "\nFile not found: " << graph_file;
     CHECK_NE(fd, -1) << "\nFile not found: " << graph_file;
@@ -75,7 +79,10 @@ std::string CreateGraph(const std::string& graph_file, Workspace* ws) {
     return meta_graph.name();
     return meta_graph.name();
 }
 }
 
 
-std::string CreateGraph(const std::string& graph_file, const Device& device, Workspace* ws) {
+std::string CreateGraph(
+    const std::string&          graph_file,
+    const Device&               device,
+    Workspace*                  ws) {
     GraphDef meta_graph;
     GraphDef meta_graph;
     int fd = open(graph_file.c_str(), O_RDONLY);
     int fd = open(graph_file.c_str(), O_RDONLY);
     CHECK_NE(fd, -1) << "\nFile not found: " << graph_file;
     CHECK_NE(fd, -1) << "\nFile not found: " << graph_file;
@@ -95,26 +102,29 @@ std::string CreateGraph(const std::string& graph_file, const Device& device, Wor
     return meta_graph.name();
     return meta_graph.name();
 }
 }
 
 
-void CreateTensor(const std::string& name, Workspace* ws) {
+void CreateTensor(
+    const std::string&          name,
+    Workspace*                  ws) {
     ws->CreateTensor(name);
     ws->CreateTensor(name);
 }
 }
 
 
 template <typename T>
 template <typename T>
-void FeedTensor(const std::string& name,
+void FeedTensor(
+    const std::string&          name,
     const vector<TIndex>&       shape,
     const vector<TIndex>&       shape,
     const T*                    data,
     const T*                    data,
     const Device&               device,
     const Device&               device,
     Workspace*                  ws) {
     Workspace*                  ws) {
     Tensor* tensor = ws->CreateTensor(name);
     Tensor* tensor = ws->CreateTensor(name);
     tensor->Reshape(shape);
     tensor->Reshape(shape);
-    if (device.device_type() == CUDA) {
+    if (device.device_type() == 1) {
         CUDAContext context(device.device_id());
         CUDAContext context(device.device_id());
         context.SwitchToDevice();
         context.SwitchToDevice();
         tensor->mutable_data<T, CUDAContext>();
         tensor->mutable_data<T, CUDAContext>();
         context.Memcpy<CUDAContext, CPUContext>(tensor->nbytes(),
         context.Memcpy<CUDAContext, CPUContext>(tensor->nbytes(),
                          tensor->raw_mutable_data<CUDAContext>(),
                          tensor->raw_mutable_data<CUDAContext>(),
                                  static_cast<const void*>(data));
                                  static_cast<const void*>(data));
-    } else if (device.device_type() == CPU) {
+    } else if (device.device_type() == 0) {
         CPUContext context;
         CPUContext context;
         tensor->mutable_data<T, CPUContext>();
         tensor->mutable_data<T, CPUContext>();
         context.Memcpy<CPUContext, CPUContext>(tensor->nbytes(),
         context.Memcpy<CPUContext, CPUContext>(tensor->nbytes(),
@@ -125,7 +135,9 @@ void FeedTensor(const std::string& name,
     }
     }
 }
 }
 
 
-void TransplantCaffeModel(const std::string& input_model, const std::string& output_model) {
+void TransplantCaffeModel(
+    const std::string&          input_model,
+    const std::string&          output_model) {
     TensorProtos protos;
     TensorProtos protos;
     NetParameter net_param;
     NetParameter net_param;
     ReadProtoFromBinaryFile(input_model.c_str(), &net_param);
     ReadProtoFromBinaryFile(input_model.c_str(), &net_param);
@@ -151,13 +163,16 @@ void TransplantCaffeModel(const std::string& input_model, const std::string& out
                 << ", size: " << blob.data_size();
                 << ", size: " << blob.data_size();
         }
         }
     }
     }
-    std::fstream output(output_model, std::ios::out | std::ios::trunc | std::ios::binary);
+    std::fstream output(output_model,
+        std::ios::out | std::ios::trunc | std::ios::binary);
     CHECK(protos.SerializeToOstream(&output));
     CHECK(protos.SerializeToOstream(&output));
     LOG(INFO) << "save the model @: " << output_model << "......";
     LOG(INFO) << "save the model @: " << output_model << "......";
     LOG(INFO) << "model format: DragonMoel";
     LOG(INFO) << "model format: DragonMoel";
 }
 }
 
 
-void LoadDragonmodel(const std::string& model_file, Workspace* ws){
+void LoadDragonmodel(
+    const std::string&          model_file,
+    Workspace*                  ws){
     TensorProtos tensors;
     TensorProtos tensors;
     ReadProtoFromBinaryFile(model_file.c_str(), &tensors);
     ReadProtoFromBinaryFile(model_file.c_str(), &tensors);
     LOG(INFO) << "Restore From Model @: " << model_file << "......";
     LOG(INFO) << "Restore From Model @: " << model_file << "......";
@@ -190,7 +205,9 @@ void LoadDragonmodel(const std::string& model_file, Workspace* ws){
     }
     }
 }
 }
 
 
-void LoadCaffemodel(const std::string& model_file, Workspace* ws){
+void LoadCaffemodel(
+    const std::string&          model_file,
+    Workspace*                  ws){
     NetParameter net_param;
     NetParameter net_param;
     ReadProtoFromBinaryFile(model_file.c_str(), &net_param);
     ReadProtoFromBinaryFile(model_file.c_str(), &net_param);
     std::string scope = "";
     std::string scope = "";
@@ -231,12 +248,15 @@ void LoadCaffemodel(const std::string& model_file, Workspace* ws){
     }
     }
 }
 }
 
 
-void RunGraph(const std::string& graph_name, Workspace* ws) {
+void RunGraph(
+    const std::string&          graph_name,
+    Workspace*                  ws) {
     ws->RunGraph(graph_name, "", "");
     ws->RunGraph(graph_name, "", "");
 }
 }
 
 
 template <typename T>
 template <typename T>
-T* FetchTensor(const std::string& name,
+T* FetchTensor(
+    const std::string&          name,
     vector<TIndex>&             shape,
     vector<TIndex>&             shape,
     Workspace*                  ws){
     Workspace*                  ws){
     if (!ws->HasTensor(name)){
     if (!ws->HasTensor(name)){
@@ -251,13 +271,11 @@ T* FetchTensor(const std::string& name,
     shape = tensor->dims();
     shape = tensor->dims();
     void* data = malloc(tensor->nbytes());
     void* data = malloc(tensor->nbytes());
     if (tensor->memory_state() == MixedMemory::STATE_AT_CUDA) {
     if (tensor->memory_state() == MixedMemory::STATE_AT_CUDA) {
-        CUDAContext::Memcpy<CPUContext, CUDAContext>(tensor->nbytes(),
-                                                                 data,
-                                     tensor->raw_data<CUDAContext>());
+        CUDAContext::Memcpy<CPUContext, CUDAContext>(
+            tensor->nbytes(), data, tensor->raw_data<CUDAContext>());
     } else {
     } else {
-        CPUContext::Memcpy<CPUContext, CPUContext>(tensor->nbytes(),
-                                                               data,
-                                    tensor->raw_data<CPUContext>());
+        CPUContext::Memcpy<CPUContext, CPUContext>(
+            tensor->nbytes(), data, tensor->raw_data<CPUContext>());
     }
     }
     return static_cast<T*>(data);
     return static_cast<T*>(data);
 }
 }
@@ -266,4 +284,30 @@ void SetLogLevel(const std::string& level) {
     SetLogDestination(StrToLogSeverity(level));
     SetLogDestination(StrToLogSeverity(level));
 }
 }
 
 
+template float* FetchTensor<float>(
+    const std::string&,
+    std::vector<TIndex>&,
+    Workspace*);
+
+template void FeedTensor<float>(
+    const std::string&,
+    const std::vector<TIndex>&,
+    const float*,
+    const Device&,
+    Workspace*);
+
+template void FeedTensor<int>(
+    const std::string&,
+    const std::vector<TIndex>&,
+    const int*,
+    const Device&,
+    Workspace*);
+
+template void FeedTensor<uint8_t>(
+    const std::string&,
+    const std::vector<TIndex>&,
+    const uint8_t*,
+    const Device&,
+    Workspace*);
+
 }    // namespace dragon
 }    // namespace dragon
\ No newline at end of file

Dragon/modules/cxx/dragon.h

@@ -29,18 +29,16 @@ typedef int64_t TIndex;
 class Workspace;
 class Workspace;
 
 
 class Device {
 class Device {
-    enum DeviceType { CPU, CUDA };
-
  public:
  public:
     EXPORT Device();
     EXPORT Device();
     EXPORT explicit Device(std::string device_type);
     EXPORT explicit Device(std::string device_type);
     EXPORT Device(std::string device_type, int device_id);
     EXPORT Device(std::string device_type, int device_id);
 
 
-    EXPORT const DeviceType& device_type() const { return device_type_; }
+    EXPORT const int& device_type() const { return device_type_; }
     EXPORT const int device_id() const { return device_id_; }
     EXPORT const int device_id() const { return device_id_; }
 
 
  private:
  private:
-     DeviceType device_type_;
+     int device_type_;
      int device_id_;
      int device_id_;
 };
 };
 
 
@@ -52,53 +50,48 @@ EXPORT void ReleaseWorkspace(const std::string& name);
 
 
 EXPORT void MoveWorkspace(Workspace* main, Workspace* sub);
 EXPORT void MoveWorkspace(Workspace* main, Workspace* sub);
 
 
-EXPORT std::string CreateGraph(const std::string& graph_file, Workspace* ws);
+EXPORT std::string CreateGraph(
+    const std::string&          graph_file,
+    Workspace*                  ws);
 
 
-EXPORT std::string CreateGraph(const std::string& graph_file, const Device& device, Workspace* ws);
+EXPORT std::string CreateGraph(
+    const std::string&          graph_file,
+    const Device&               device,
+    Workspace*                  ws);
 
 
-EXPORT void RunGraph(const std::string& graph_name, Workspace* ws);
+EXPORT void RunGraph(
+    const std::string&          graph_name,
+    Workspace*                  ws);
 
 
-EXPORT void CreateTensor(const std::string& name, Workspace* ws);
+EXPORT void CreateTensor(
+    const std::string&          name,
+    Workspace*                  ws);
 
 
 template <typename T>
 template <typename T>
-void FeedTensor(const std::string& name,
+EXPORT void FeedTensor(
+    const std::string&          name,
     const std::vector<TIndex>&  shape,
     const std::vector<TIndex>&  shape,
     const T*                    data,
     const T*                    data,
     const Device&               device,
     const Device&               device,
     Workspace*                  ws);
     Workspace*                  ws);
 
 
 template <typename T>
 template <typename T>
-T* FetchTensor(const std::string& name,
+EXPORT T* FetchTensor(
+    const std::string&          name,
     std::vector<TIndex>&        shape,
     std::vector<TIndex>&        shape,
     Workspace*                  ws);
     Workspace*                  ws);
 
 
-template EXPORT float* FetchTensor(const std::string&,
-                                   std::vector<TIndex>&,
-                                   Workspace*);
-
-template EXPORT void FeedTensor(const std::string&,
-                                const std::vector<TIndex>&,
-                                const float*,
-                                const Device&,
-                                Workspace*);
-
-template EXPORT void FeedTensor(const std::string&,
-                                const std::vector<TIndex>&,
-                                const int*,
-                                const Device&,
-                                Workspace*);
-
-template EXPORT void FeedTensor(const std::string&,
-                                const std::vector<TIndex>&,
-                                const uint8_t*,
-                                const Device&,
-                                Workspace*);
-
-EXPORT void LoadCaffemodel(const std::string& model_file, Workspace* ws);
+EXPORT void LoadCaffemodel(
+    const std::string&          model_file,
+    Workspace*                  ws);
 
 
-EXPORT void TransplantCaffeModel(const std::string& input_model, const std::string& output_model);
+EXPORT void TransplantCaffeModel(
+    const std::string&          input_model,
+    const std::string&          output_model);
 
 
-EXPORT void LoadDragonmodel(const std::string& model_file, Workspace* ws);
+EXPORT void LoadDragonmodel(
+    const std::string&          model_file,
+    Workspace*                  ws);
 
 
 EXPORT void SetLogLevel(const std::string& level);
 EXPORT void SetLogLevel(const std::string& level);
 
 

Dragon/modules/python/dragon.cc

@@ -231,6 +231,7 @@ PyMethodDef* GetAllMethods() {
         PYFUNC(RenameTensorCC),
         PYFUNC(RenameTensorCC),
         PYFUNC(TensorFromShapeCC),
         PYFUNC(TensorFromShapeCC),
         PYFUNC(TensorFromPyArrayCC),
         PYFUNC(TensorFromPyArrayCC),
+        PYFUNC(TensorFromTensorCC),
         PYFUNC(GetTensorNameCC),
         PYFUNC(GetTensorNameCC),
         PYFUNC(GetTensorInfoCC),
         PYFUNC(GetTensorInfoCC),
         PYFUNC(FeedTensorCC),
         PYFUNC(FeedTensorCC),

Dragon/modules/python/py_tensor.h

@@ -152,6 +152,55 @@ PyObject* TensorFromPyArrayCC(PyObject* self, PyObject* args) {
     Py_RETURN_TRUE;
     Py_RETURN_TRUE;
 }
 }
 
 
+PyObject* TensorFromTensorCC(PyObject* self, PyObject* args) {
+    char* dst_name, *src_name;
+    PyObject* py_dst_ctx = nullptr, *py_src_ctx = nullptr;
+    if (!PyArg_ParseTuple(args, "ssOO",
+        &dst_name, &src_name, &py_dst_ctx, &py_src_ctx)) {
+        PyErr_SetString(PyExc_ValueError,
+            "Failed to create tensor from tensor.\n"
+            "Excepted the (dest, src) name and context.");
+        return nullptr;
+    }
+    DeviceOption dst_ctx, src_ctx;
+    dst_ctx.ParseFromString(PyBytes_AsStringEx(py_dst_ctx));
+    src_ctx.ParseFromString(PyBytes_AsStringEx(py_src_ctx));
+    Tensor* srcT = ws()->GetTensor(src_name);
+    Tensor* dstT = ws()->CreateTensor(dst_name);
+    dstT->ReshapeLike(*srcT);
+    dstT->SetMeta(srcT->meta());
+    if (dst_ctx.device_type() == DeviceType::CUDA) {
+        if (src_ctx.device_type() == DeviceType::CUDA) {
+            //  CUDA <- CUDA
+            CUDAContext::Memcpy<CUDAContext, CUDAContext>(
+                srcT->nbytes(),
+                    dstT->raw_mutable_data<CUDAContext>(),
+                        srcT->raw_data<CUDAContext>());
+        } else {
+            //  CUDA <- CPU
+            CUDAContext::Memcpy<CUDAContext, CUDAContext>(
+                srcT->nbytes(),
+                    dstT->raw_mutable_data<CUDAContext>(),
+                        srcT->raw_data<CPUContext>());
+        }
+    } else {
+        if (src_ctx.device_type() == DeviceType::CUDA) {
+            //  CPU <- CUDA
+            CUDAContext::Memcpy<CUDAContext, CUDAContext>(
+                srcT->nbytes(),
+                    dstT->raw_mutable_data<CPUContext>(),
+                        srcT->raw_data<CUDAContext>());
+        } else {
+            //  CPU <- CPU
+            CUDAContext::Memcpy<CUDAContext, CUDAContext>(
+                srcT->nbytes(),
+                    dstT->raw_mutable_data<CPUContext>(),
+                        srcT->raw_data<CPUContext>());
+        }
+    }
+    Py_RETURN_TRUE;
+}
+
 inline PyObject* TensorToPyArrayCC(PyObject* self, PyObject* args) {
 inline PyObject* TensorToPyArrayCC(PyObject* self, PyObject* args) {
     Tensor* tensor = ws()->GetTensor(ParseName(self, args));
     Tensor* tensor = ws()->GetTensor(ParseName(self, args));
     CHECK_GT(tensor->count(), 0);
     CHECK_GT(tensor->count(), 0);
@@ -183,7 +232,8 @@ inline PyObject* TensorToPyArrayExCC(PyObject* self, PyObject* args) {
         return nullptr;
         return nullptr;
     }
     }
     auto* data = const_cast<void*>(tensor->raw_data<CPUContext>());
     auto* data = const_cast<void*>(tensor->raw_data<CPUContext>());
-    PyObject* array = PyArray_SimpleNewFromData(tensor->ndim(), dims.data(), npy_type, data);
+    PyObject* array = PyArray_SimpleNewFromData(
+        tensor->ndim(), dims.data(), npy_type, data);
     Py_XINCREF(array);
     Py_XINCREF(array);
     return array;
     return array;
 }
 }
@@ -202,7 +252,8 @@ inline PyObject* ToCUDATensorCC(PyObject* self, PyObject* args) {
     char* cname;
     char* cname;
     int device_id;
     int device_id;
     if (!PyArg_ParseTuple(args, "si", &cname, &device_id)) {
     if (!PyArg_ParseTuple(args, "si", &cname, &device_id)) {
-        PyErr_SetString(PyExc_ValueError, "Excepted the tensor name and device id.");
+        PyErr_SetString(PyExc_ValueError,
+            "Excepted the tensor name and device id.");
         return nullptr;
         return nullptr;
     }
     }
     Tensor* t = ws()->GetTensor(cname);
     Tensor* t = ws()->GetTensor(cname);

Dragon/modules/python/py_types.h

@@ -23,7 +23,8 @@ inline const int TypeMetaToNPY(const TypeMeta& meta) {
             { TypeMeta::Id<int64_t>(), NPY_INT64 },
             { TypeMeta::Id<int64_t>(), NPY_INT64 },
             { TypeMeta::Id<double>(), NPY_FLOAT64 },
             { TypeMeta::Id<double>(), NPY_FLOAT64 },
             { TypeMeta::Id<float16>(), NPY_FLOAT16 },
             { TypeMeta::Id<float16>(), NPY_FLOAT16 },
-            { TypeMeta::Id<uint8_t>(), NPY_UINT8  }
+            { TypeMeta::Id<uint8_t>(), NPY_UINT8 },
+            { TypeMeta::Id<char>(), NPY_INT8 }
     };
     };
     return m2npy_type_map.count(meta.id()) ? m2npy_type_map[meta.id()] : -1;
     return m2npy_type_map.count(meta.id()) ? m2npy_type_map[meta.id()] : -1;
 }
 }
@@ -35,7 +36,8 @@ inline const TypeMeta& TypeNPYToMeta(int npy_type) {
             { NPY_INT64, TypeMeta::Make<int64_t>() },
             { NPY_INT64, TypeMeta::Make<int64_t>() },
             { NPY_FLOAT64, TypeMeta::Make<double>() },
             { NPY_FLOAT64, TypeMeta::Make<double>() },
             { NPY_FLOAT16, TypeMeta::Make<float16>() },
             { NPY_FLOAT16, TypeMeta::Make<float16>() },
-            { NPY_UINT8, TypeMeta::Make<uint8_t>() }
+            { NPY_UINT8, TypeMeta::Make<uint8_t>() },
+            { NPY_INT8, TypeMeta::Make<char>() },
     };
     };
     static TypeMeta unknown_type;
     static TypeMeta unknown_type;
     return npy2m_type_map.count(npy_type) ? npy2m_type_map[npy_type] : unknown_type;
     return npy2m_type_map.count(npy_type) ? npy2m_type_map[npy_type] : unknown_type;

Dragon/python/dragon/core/tensor_utils.py

@@ -24,6 +24,7 @@ from dragon.core.utils import MakeDeviceOption
 __all__ = [
 __all__ = [
     'FromShape',
     'FromShape',
     'SetShape',
     'SetShape',
+    'FromTensor',
     'FromPyArray',
     'FromPyArray',
     'SetPyArray',
     'SetPyArray',
     'ToPyArray',
     'ToPyArray',
@@ -113,6 +114,40 @@ def SetShape(tensor, shape, dtype='float32'):
     TensorFromShapeCC(_stringify_tensor(tensor), shape, dtype)
     TensorFromShapeCC(_stringify_tensor(tensor), shape, dtype)
 
 
 
 
+def FromTensor(src, src_ctx=None, name=None, ctx=None):
+    """Create a Tensor from a existing tensor.
+
+    Parameters
+    ----------
+    src_ctx : str
+        The name of source tensor.
+    src_ctx : dragon_pb2.DeviceOption
+        The context of source tensor.
+    name : str
+        The optional tensor name for destination tensor.
+    ctx : dragon_pb2.DeviceOption
+        The context for destination tensor.
+
+    Returns
+    -------
+    Tensor
+        The tensor with the same data as source.
+
+    References
+    ----------
+    The wrapper of ``TensorFromTensorCC``.
+
+    """
+    if name is None: tensor = Tensor(name=name)
+    else: tensor = Tensor(_name=name)
+    if src_ctx is None: src_ctx = MakeDeviceOption(0, 0) # CPUContext
+    if ctx is None: ctx = MakeDeviceOption(0, 0)  # CPUContext
+    TensorFromTensorCC(
+        _stringify_tensor(tensor), _stringify_tensor(src),
+        _stringify_proto(ctx), _stringify_proto(src_ctx))
+    return tensor
+
+
 def FromPyArray(array, name=None):
 def FromPyArray(array, name=None):
     """Create a Tensor from a existing Array.
     """Create a Tensor from a existing Array.
 
 
@@ -120,7 +155,7 @@ def FromPyArray(array, name=None):
 
 
     Parameters
     Parameters
     ----------
     ----------
-    array : np.ndarray
+    array : ndarray
         The array for creating the tensor.
         The array for creating the tensor.
     name : str
     name : str
         The optional tensor name.
         The optional tensor name.
@@ -152,7 +187,7 @@ def SetPyArray(tensor, array):
     ----------
     ----------
     tensor : Tensor, str or None
     tensor : Tensor, str or None
         The specific tensor to use.
         The specific tensor to use.
-    array : numpy.ndarray
+    array : ndarray
         The array for creating the tensor.
         The array for creating the tensor.
 
 
     Returns
     Returns
@@ -179,7 +214,7 @@ def ToPyArray(tensor):
 
 
     Returns
     Returns
     -------
     -------
-    numpy.ndarray
+    ndarray
         The array sharing the memory with original tensor.
         The array sharing the memory with original tensor.
 
 
     References
     References
@@ -202,7 +237,7 @@ def ToPyArrayEx(tensor):
 
 
     Returns
     Returns
     -------
     -------
-    numpy.ndarray
+    ndarray
         The array sharing the memory with original tensor.
         The array sharing the memory with original tensor.
 
 
     References
     References

Dragon/python/dragon/docs/contents/ops.rst

@@ -149,7 +149,8 @@ List               Brief
 `OneHot`_          Generate the one-hot representation of inputs.
 `OneHot`_          Generate the one-hot representation of inputs.
 `Flatten`_         Flatten the input along the given axes.
 `Flatten`_         Flatten the input along the given axes.
 `Reshape`_         Reshape the dimensions of input.
 `Reshape`_         Reshape the dimensions of input.
-`ExpandDims`_      ExpandDims interface of NDArray.
+`Squeeze`_         Remove the dimensions with size 1.
+`ExpandDims`_      Expand the new dimension with size 1 to specific axis.
 `Shape`_           Get the dynamic shape of a Tensor.
 `Shape`_           Get the dynamic shape of a Tensor.
 `Arange`_          Return a vector of elements by arange.
 `Arange`_          Return a vector of elements by arange.
 ===============    ======================================================================
 ===============    ======================================================================
@@ -285,6 +286,7 @@ List                 Brief
 .. _OneHot: operators/ndarray.html#dragon.operators.ndarray.OneHot
 .. _OneHot: operators/ndarray.html#dragon.operators.ndarray.OneHot
 .. _Flatten: operators/ndarray.html#dragon.operators.ndarray.Flatten
 .. _Flatten: operators/ndarray.html#dragon.operators.ndarray.Flatten
 .. _Reshape: operators/ndarray.html#dragon.operators.ndarray.Reshape
 .. _Reshape: operators/ndarray.html#dragon.operators.ndarray.Reshape
+.. _Squeeze: operators/ndarray.html#dragon.operators.ndarray.Squeeze
 .. _ExpandDims: operators/ndarray.html#dragon.operators.ndarray.ExpandDims
 .. _ExpandDims: operators/ndarray.html#dragon.operators.ndarray.ExpandDims
 .. _Shape: operators/ndarray.html#dragon.operators.ndarray.Shape
 .. _Shape: operators/ndarray.html#dragon.operators.ndarray.Shape
 .. _Arange: operators/ndarray.html#dragon.operators.ndarray.Arange
 .. _Arange: operators/ndarray.html#dragon.operators.ndarray.Arange

Dragon/python/dragon/io/data_reader.py

@@ -97,7 +97,7 @@ class DataReader(Process):
         self._db.close()
         self._db.close()
         self._db.open(self._source)
         self._db.open(self._source)
         self._cur_idx = target_idx
         self._cur_idx = target_idx
-        self._db.set(str(self._cur_idx).zfill(self._db_zfill))
+        self._db.set(str(self._cur_idx).zfill(self._zfill))
 
 
     def reset(self):
     def reset(self):
         """Reset the cursor and environment.
         """Reset the cursor and environment.
@@ -112,12 +112,12 @@ class DataReader(Process):
             self._cur_chunk_idx = 0
             self._cur_chunk_idx = 0
             self._start_idx = int(self._part_idx * self._num_shuffle_parts + self._perm[self._cur_chunk_idx])
             self._start_idx = int(self._part_idx * self._num_shuffle_parts + self._perm[self._cur_chunk_idx])
             self._start_idx = int(self._start_idx * self._chunk_size)
             self._start_idx = int(self._start_idx * self._chunk_size)
-            if self._start_idx >= self._db_size: self.next_chunk()
+            if self._start_idx >= self._num_entries: self.next_chunk()
             self._end_idx = self._start_idx + self._chunk_size
             self._end_idx = self._start_idx + self._chunk_size
-            self._end_idx = min(self._db_size, self._end_idx)
+            self._end_idx = min(self._num_entries, self._end_idx)
         else:
         else:
             self._start_idx = 0
             self._start_idx = 0
-            self._end_idx = self._db_size
+            self._end_idx = self._num_entries
 
 
         self.redirect(self._start_idx)
         self.redirect(self._start_idx)
 
 
@@ -145,10 +145,10 @@ class DataReader(Process):
         else:
         else:
             self._start_idx = self._part_idx * self._num_shuffle_parts + self._perm[self._cur_chunk_idx]
             self._start_idx = self._part_idx * self._num_shuffle_parts + self._perm[self._cur_chunk_idx]
             self._start_idx = self._start_idx * self._chunk_size
             self._start_idx = self._start_idx * self._chunk_size
-            if self._start_idx >= self._db_size: self.next_chunk()
+            if self._start_idx >= self._num_entries: self.next_chunk()
             else:
             else:
                 self._end_idx = self._start_idx + self._chunk_size
                 self._end_idx = self._start_idx + self._chunk_size
-                self._end_idx = min(self._db_size, self._end_idx)
+                self._end_idx = min(self._num_entries, self._end_idx)
             self.redirect(self._start_idx)
             self.redirect(self._start_idx)
 
 
     def run(self):
     def run(self):
@@ -165,14 +165,14 @@ class DataReader(Process):
         # init db
         # init db
         self._db = LMDB()
         self._db = LMDB()
         self._db.open(self._source)
         self._db.open(self._source)
-        self._db_zfill = self._db.zfill()
-        self._db_size = self._db.num_entries()
-        self._epoch_size = int(self._db_size / self._num_parts + 1)
+        self._zfill = self._db.zfill()
+        self._num_entries = self._db.num_entries()
+        self._epoch_size = int(self._num_entries / self._num_parts + 1)
 
 
         if self._use_shuffle:
         if self._use_shuffle:
             if self._chunk_size == 1:
             if self._chunk_size == 1:
                 # each chunk has at most 1 record [For Fully Shuffle]
                 # each chunk has at most 1 record [For Fully Shuffle]
-                self._num_shuffle_parts = int(self._db_size / self._chunk_size / self._num_parts) + 1
+                self._num_shuffle_parts = int(self._num_entries / self._chunk_size / self._num_parts) + 1
             else:
             else:
                 if self._use_shuffle and self._chunk_size == -1:
                 if self._use_shuffle and self._chunk_size == -1:
                     # search a optimal chunk size by chunks [For Chunk Shuffle]
                     # search a optimal chunk size by chunks [For Chunk Shuffle]
@@ -182,12 +182,12 @@ class DataReader(Process):
                     self._chunk_size = min_chunk_size
                     self._chunk_size = min_chunk_size
                     self._num_shuffle_parts = int(math.ceil(self._db._total_size * 1.1 /
                     self._num_shuffle_parts = int(math.ceil(self._db._total_size * 1.1 /
                                                  (self._num_parts * self._chunk_size << 20)))
                                                  (self._num_parts * self._chunk_size << 20)))
-                    self._chunk_size = int(self._db_size / self._num_shuffle_parts / self._num_parts + 1)
+                    self._chunk_size = int(self._num_entries / self._num_shuffle_parts / self._num_parts + 1)
         else:
         else:
             # each chunk has at most K records [For Multiple Nodes]
             # each chunk has at most K records [For Multiple Nodes]
             # note that if ``shuffle`` and ``multiple_nodes`` are all ``False``,
             # note that if ``shuffle`` and ``multiple_nodes`` are all ``False``,
             # ``chunk_size`` and ``num_shuffle_parts`` are meaningless
             # ``chunk_size`` and ``num_shuffle_parts`` are meaningless
-            self._chunk_size = int(self._db_size / self._num_parts) + 1
+            self._chunk_size = int(self._num_entries / self._num_parts) + 1
             self._num_shuffle_parts = 1
             self._num_shuffle_parts = 1
 
 
         self._perm = np.arange(self._num_shuffle_parts)
         self._perm = np.arange(self._num_shuffle_parts)

Dragon/python/dragon/operators/ndarray.py

@@ -727,11 +727,11 @@ def Reshape(inputs, shape, shape_like=None, **kwargs):
     Examples
     Examples
     --------
     --------
     >>> a = Tensor(shape=[1, 2, 3, 4]).Variable()
     >>> a = Tensor(shape=[1, 2, 3, 4]).Variable()
-    >>> print Reshape(a, shape=[6, 4])
+    >>> print(Reshape(a, shape=[6, 4]))
     >>> [6, 4]
     >>> [6, 4]
 
 
     >>> b = Reshape(a, shape=[-1, 4]) # shape will be [6, 4] in the backend
     >>> b = Reshape(a, shape=[-1, 4]) # shape will be [6, 4] in the backend
-    >>> print b.shape
+    >>> print(b.shape)
     >>> [1, 4] # fake dimension at axis 0
     >>> [1, 4] # fake dimension at axis 0
 
 
     """
     """
@@ -766,15 +766,58 @@ def Reshape(inputs, shape, shape_like=None, **kwargs):
     return output
     return output
 
 
 
 
-def ExpandDims(inputs, axis=-1, **kwargs):
-    """ExpandDims interface of NDArray.
+def Squeeze(inputs, axis=None, **kwargs):
+    """Remove the dimensions with size 1.
+
+    Set ``axis`` to remove the specific position.
+
+    Parameters
+    ----------
+    inputs : Tensor
+        The input tensor.
+    axis : int or None
+        The specific axis to remove.
+
+    Returns
+    -------
+    Tensor
+        The output tensor.
+
+    Examples
+    --------
+    >>> a = Tensor(shape=[2, 1, 3, 4]).Variable()
+    >>> print(Squeeze(a).shape)
+    >>> print(Squeeze(a, axis=0).shape)
+
+    """
+    CheckInputs(inputs, 1)
+    arguments = ParseArguments(locals())
+
+    output = Tensor.CreateOperator(nout=1, op_type='Squeeze', **arguments)
+
+    if inputs.shape is not None:
+        output_shape = []
+        if axis: axis += (0 if axis >= 0 else len(inputs.shape))
+        for idx, dim in enumerate(inputs.shape[:]):
+            if dim != 1 or \
+                (axis and dim == 1 and idx != axis):
+                    output_shape.append(dim)
+        output.shape = output_shape
+
+    return output
+
+
+def ExpandDims(inputs, axis, **kwargs):
+    """Expand the new dimension with size 1 to specific axis.
+
+    Negative ``axis`` is equal to ``axis = axis + num_axes + 1``.
 
 
     Parameters
     Parameters
     ----------
     ----------
     inputs : Tensor
     inputs : Tensor
         The input tensor.
         The input tensor.
     axis : int
     axis : int
-        The insert position of new dimension. Default is ``-1`` (Push Back).
+        The insert axis of new dimension.
 
 
     Returns
     Returns
     -------
     -------
@@ -784,9 +827,8 @@ def ExpandDims(inputs, axis=-1, **kwargs):
     Examples
     Examples
     --------
     --------
     >>> a = Tensor(shape=[1, 2, 3, 4]).Variable()
     >>> a = Tensor(shape=[1, 2, 3, 4]).Variable()
-    >>> print ExpandDims(a).shape
-
-    >>> print ExpandDims(a, axis=2).shape
+    >>> print(ExpandDims(a).shape)
+    >>> print(ExpandDims(a, axis=2).shape)
 
 
     """
     """
     CheckInputs(inputs, 1)
     CheckInputs(inputs, 1)
@@ -796,7 +838,8 @@ def ExpandDims(inputs, axis=-1, **kwargs):
 
 
     if inputs.shape is not None:
     if inputs.shape is not None:
         output.shape = inputs.shape[:]
         output.shape = inputs.shape[:]
-        if axis == -1 or axis >= len(inputs.shape):
+        axis += (0 if axis >= 0 else len(inputs.shape) + 1)
+        if axis < 0 or axis >= len(inputs.shape):
             output.shape.append(np.long(1))
             output.shape.append(np.long(1))
         else: output.shape.insert(axis, np.long(1))
         else: output.shape.insert(axis, np.long(1))
 
 

Dragon/python/dragon/ops.py

@@ -129,6 +129,7 @@ OneHot = ndarray.OneHot
 Flatten = ndarray.Flatten
 Flatten = ndarray.Flatten
 Reshape = ndarray.Reshape
 Reshape = ndarray.Reshape
 ExpandDims = ndarray.ExpandDims
 ExpandDims = ndarray.ExpandDims
+Squeeze = ndarray.Squeeze
 Shape = ndarray.Shape
 Shape = ndarray.Shape
 Arange = ndarray.Arange
 Arange = ndarray.Arange
 
 

Dragon/python/dragon/protos/dragon.proto

 syntax = "proto2";
 syntax = "proto2";
 
 
+package dragon;
+
 message TensorProto {
 message TensorProto {
   repeated int32 dims = 1;
   repeated int32 dims = 1;
   enum DataType {
   enum DataType {

Dragon/python/dragon/protos/dragon_pb2.py

@@ -18,14 +18,14 @@ _sym_db = _symbol_database.Default()
 
 
 DESCRIPTOR = _descriptor.FileDescriptor(
 DESCRIPTOR = _descriptor.FileDescriptor(
   name='dragon.proto',
   name='dragon.proto',
-  package='',
-  serialized_pb=_b('\n\x0c\x64ragon.proto\"\xf7\x01\n\x0bTensorProto\x12\x0c\n\x04\x64ims\x18\x01 \x03(\x05\x12/\n\tdata_type\x18\x02 \x01(\x0e\x32\x15.TensorProto.DataType:\x05\x46LOAT\x12\x16\n\nfloat_data\x18\x03 \x03(\x02\x42\x02\x10\x01\x12\x16\n\nint32_data\x18\x04 \x03(\x05\x42\x02\x10\x01\x12\x11\n\tbyte_data\x18\x05 \x01(\x0c\x12\x13\n\x0bstring_data\x18\x06 \x03(\x0c\x12\x0c\n\x04name\x18\x07 \x01(\t\"C\n\x08\x44\x61taType\x12\t\n\x05\x46LOAT\x10\x01\x12\t\n\x05INT32\x10\x02\x12\x08\n\x04\x42YTE\x10\x03\x12\n\n\x06STRING\x10\x04\x12\x0b\n\x07\x46LOAT16\x10\x0c\",\n\x0cTensorProtos\x12\x1c\n\x06protos\x18\x01 \x03(\x0b\x32\x0c.TensorProto\"\x80\x01\n\x08\x41rgument\x12\x0c\n\x04name\x18\x01 \x01(\t\x12\t\n\x01\x66\x18\x02 \x01(\x02\x12\t\n\x01i\x18\x03 \x01(\x05\x12\x0b\n\x03i64\x18\t \x01(\x03\x12\t\n\x01s\x18\x04 \x01(\t\x12\t\n\x01\x62\x18\x08 \x01(\x08\x12\x0e\n\x06\x66loats\x18\x05 \x03(\x02\x12\x0c\n\x04ints\x18\x06 \x03(\x05\x12\x0f\n\x07strings\x18\x07 \x03(\t\"s\n\x0c\x44\x65viceOption\x12%\n\x0b\x64\x65vice_type\x18\x01 \x01(\x0e\x32\x0b.DeviceType:\x03\x43PU\x12\x14\n\tdevice_id\x18\x02 \x01(\x05:\x01\x30\x12\x16\n\x0brandom_seed\x18\x03 \x01(\r:\x01\x33\x12\x0e\n\x06\x65ngine\x18\x04 \x01(\t\"\x86\x01\n\x0bOperatorDef\x12\r\n\x05input\x18\x01 \x03(\t\x12\x0e\n\x06output\x18\x02 \x03(\t\x12\x0c\n\x04name\x18\x03 \x01(\t\x12\x0c\n\x04type\x18\x04 \x01(\t\x12\x16\n\x03\x61rg\x18\x05 \x03(\x0b\x32\t.Argument\x12$\n\rdevice_option\x18\x06 \x01(\x0b\x32\r.DeviceOption\"=\n\x0eGradientTarget\x12\x0c\n\x04\x63ost\x18\x01 \x01(\t\x12\x0b\n\x03wrt\x18\x02 \x01(\t\x12\x10\n\x08\x65xternal\x18\x03 \x01(\t\"R\n\x0cUpdateTarget\x12\x0c\n\x04name\x18\x01 \x01(\t\x12\x0c\n\x04type\x18\x02 \x01(\t\x12\x0e\n\x06tensor\x18\x03 \x03(\t\x12\x16\n\x03\x61rg\x18\x04 \x03(\x0b\x32\t.Argument\"\x8d\x02\n\x0cTensorFiller\x12\x0e\n\x06tensor\x18\x01 \x01(\t\x12\x16\n\x04type\x18\x02 \x01(\t:\x08\x63onstant\x12\x10\n\x05value\x18\x03 \x01(\x02:\x01\x30\x12\x0e\n\x03low\x18\x04 \x01(\x02:\x01\x30\x12\x0f\n\x04high\x18\x05 \x01(\x02:\x01\x31\x12\x0f\n\x04mean\x18\x06 \x01(\x02:\x01\x30\x12\x0e\n\x03std\x18\x07 \x01(\x02:\x01\x31\x12\x10\n\x05scale\x18\x08 \x01(\x02:\x01\x33\x12\x39\n\rvariance_norm\x18\t \x01(\x0e\x32\x1a.TensorFiller.VarianceNorm:\x06\x46\x41N_IN\"4\n\x0cVarianceNorm\x12\n\n\x06\x46\x41N_IN\x10\x00\x12\x0b\n\x07\x46\x41N_OUT\x10\x01\x12\x0b\n\x07\x46\x41N_AVG\x10\x02\"\xd8\x01\n\x08GraphDef\x12\x0c\n\x04name\x18\x01 \x01(\t\x12\x18\n\x02op\x18\x02 \x03(\x0b\x32\x0c.OperatorDef\x12\x12\n\ngraph_type\x18\x03 \x01(\t\x12$\n\rdevice_option\x18\x05 \x01(\x0b\x32\r.DeviceOption\x12\x16\n\x03\x61rg\x18\x06 \x03(\x0b\x32\t.Argument\x12\x0e\n\x06target\x18\x07 \x03(\t\x12!\n\x08g_target\x18\x08 \x03(\x0b\x32\x0f.GradientTarget\x12\x1f\n\x08u_target\x18\t \x03(\x0b\x32\r.UpdateTarget*+\n\nDeviceType\x12\x07\n\x03\x43PU\x10\x00\x12\x08\n\x04\x43UDA\x10\x01\x12\n\n\x06OPENCL\x10\x02')
+  package='dragon',
+  serialized_pb=_b('\n\x0c\x64ragon.proto\x12\x06\x64ragon\"\xfe\x01\n\x0bTensorProto\x12\x0c\n\x04\x64ims\x18\x01 \x03(\x05\x12\x36\n\tdata_type\x18\x02 \x01(\x0e\x32\x1c.dragon.TensorProto.DataType:\x05\x46LOAT\x12\x16\n\nfloat_data\x18\x03 \x03(\x02\x42\x02\x10\x01\x12\x16\n\nint32_data\x18\x04 \x03(\x05\x42\x02\x10\x01\x12\x11\n\tbyte_data\x18\x05 \x01(\x0c\x12\x13\n\x0bstring_data\x18\x06 \x03(\x0c\x12\x0c\n\x04name\x18\x07 \x01(\t\"C\n\x08\x44\x61taType\x12\t\n\x05\x46LOAT\x10\x01\x12\t\n\x05INT32\x10\x02\x12\x08\n\x04\x42YTE\x10\x03\x12\n\n\x06STRING\x10\x04\x12\x0b\n\x07\x46LOAT16\x10\x0c\"3\n\x0cTensorProtos\x12#\n\x06protos\x18\x01 \x03(\x0b\x32\x13.dragon.TensorProto\"\x80\x01\n\x08\x41rgument\x12\x0c\n\x04name\x18\x01 \x01(\t\x12\t\n\x01\x66\x18\x02 \x01(\x02\x12\t\n\x01i\x18\x03 \x01(\x05\x12\x0b\n\x03i64\x18\t \x01(\x03\x12\t\n\x01s\x18\x04 \x01(\t\x12\t\n\x01\x62\x18\x08 \x01(\x08\x12\x0e\n\x06\x66loats\x18\x05 \x03(\x02\x12\x0c\n\x04ints\x18\x06 \x03(\x05\x12\x0f\n\x07strings\x18\x07 \x03(\t\"z\n\x0c\x44\x65viceOption\x12,\n\x0b\x64\x65vice_type\x18\x01 \x01(\x0e\x32\x12.dragon.DeviceType:\x03\x43PU\x12\x14\n\tdevice_id\x18\x02 \x01(\x05:\x01\x30\x12\x16\n\x0brandom_seed\x18\x03 \x01(\r:\x01\x33\x12\x0e\n\x06\x65ngine\x18\x04 \x01(\t\"\x94\x01\n\x0bOperatorDef\x12\r\n\x05input\x18\x01 \x03(\t\x12\x0e\n\x06output\x18\x02 \x03(\t\x12\x0c\n\x04name\x18\x03 \x01(\t\x12\x0c\n\x04type\x18\x04 \x01(\t\x12\x1d\n\x03\x61rg\x18\x05 \x03(\x0b\x32\x10.dragon.Argument\x12+\n\rdevice_option\x18\x06 \x01(\x0b\x32\x14.dragon.DeviceOption\"=\n\x0eGradientTarget\x12\x0c\n\x04\x63ost\x18\x01 \x01(\t\x12\x0b\n\x03wrt\x18\x02 \x01(\t\x12\x10\n\x08\x65xternal\x18\x03 \x01(\t\"Y\n\x0cUpdateTarget\x12\x0c\n\x04name\x18\x01 \x01(\t\x12\x0c\n\x04type\x18\x02 \x01(\t\x12\x0e\n\x06tensor\x18\x03 \x03(\t\x12\x1d\n\x03\x61rg\x18\x04 \x03(\x0b\x32\x10.dragon.Argument\"\x94\x02\n\x0cTensorFiller\x12\x0e\n\x06tensor\x18\x01 \x01(\t\x12\x16\n\x04type\x18\x02 \x01(\t:\x08\x63onstant\x12\x10\n\x05value\x18\x03 \x01(\x02:\x01\x30\x12\x0e\n\x03low\x18\x04 \x01(\x02:\x01\x30\x12\x0f\n\x04high\x18\x05 \x01(\x02:\x01\x31\x12\x0f\n\x04mean\x18\x06 \x01(\x02:\x01\x30\x12\x0e\n\x03std\x18\x07 \x01(\x02:\x01\x31\x12\x10\n\x05scale\x18\x08 \x01(\x02:\x01\x33\x12@\n\rvariance_norm\x18\t \x01(\x0e\x32!.dragon.TensorFiller.VarianceNorm:\x06\x46\x41N_IN\"4\n\x0cVarianceNorm\x12\n\n\x06\x46\x41N_IN\x10\x00\x12\x0b\n\x07\x46\x41N_OUT\x10\x01\x12\x0b\n\x07\x46\x41N_AVG\x10\x02\"\xfb\x01\n\x08GraphDef\x12\x0c\n\x04name\x18\x01 \x01(\t\x12\x1f\n\x02op\x18\x02 \x03(\x0b\x32\x13.dragon.OperatorDef\x12\x12\n\ngraph_type\x18\x03 \x01(\t\x12+\n\rdevice_option\x18\x05 \x01(\x0b\x32\x14.dragon.DeviceOption\x12\x1d\n\x03\x61rg\x18\x06 \x03(\x0b\x32\x10.dragon.Argument\x12\x0e\n\x06target\x18\x07 \x03(\t\x12(\n\x08g_target\x18\x08 \x03(\x0b\x32\x16.dragon.GradientTarget\x12&\n\x08u_target\x18\t \x03(\x0b\x32\x14.dragon.UpdateTarget*+\n\nDeviceType\x12\x07\n\x03\x43PU\x10\x00\x12\x08\n\x04\x43UDA\x10\x01\x12\n\n\x06OPENCL\x10\x02')
 )
 )
 _sym_db.RegisterFileDescriptor(DESCRIPTOR)
 _sym_db.RegisterFileDescriptor(DESCRIPTOR)
 
 
 _DEVICETYPE = _descriptor.EnumDescriptor(
 _DEVICETYPE = _descriptor.EnumDescriptor(
   name='DeviceType',
   name='DeviceType',
-  full_name='DeviceType',
+  full_name='dragon.DeviceType',
   filename=None,
   filename=None,
   file=DESCRIPTOR,
   file=DESCRIPTOR,
   values=[
   values=[
@@ -44,8 +44,8 @@ _DEVICETYPE = _descriptor.EnumDescriptor(
   ],
   ],
   containing_type=None,
   containing_type=None,
   options=None,
   options=None,
-  serialized_start=1335,
-  serialized_end=1378,
+  serialized_start=1427,
+  serialized_end=1470,
 )
 )
 _sym_db.RegisterEnumDescriptor(_DEVICETYPE)
 _sym_db.RegisterEnumDescriptor(_DEVICETYPE)
 
 
@@ -57,7 +57,7 @@ OPENCL = 2
 
 
 _TENSORPROTO_DATATYPE = _descriptor.EnumDescriptor(
 _TENSORPROTO_DATATYPE = _descriptor.EnumDescriptor(
   name='DataType',
   name='DataType',
-  full_name='TensorProto.DataType',
+  full_name='dragon.TensorProto.DataType',
   filename=None,
   filename=None,
   file=DESCRIPTOR,
   file=DESCRIPTOR,
   values=[
   values=[
@@ -84,14 +84,14 @@ _TENSORPROTO_DATATYPE = _descriptor.EnumDescriptor(
   ],
   ],
   containing_type=None,
   containing_type=None,
   options=None,
   options=None,
-  serialized_start=197,
-  serialized_end=264,
+  serialized_start=212,
+  serialized_end=279,
 )
 )
 _sym_db.RegisterEnumDescriptor(_TENSORPROTO_DATATYPE)
 _sym_db.RegisterEnumDescriptor(_TENSORPROTO_DATATYPE)
 
 
 _TENSORFILLER_VARIANCENORM = _descriptor.EnumDescriptor(
 _TENSORFILLER_VARIANCENORM = _descriptor.EnumDescriptor(
   name='VarianceNorm',
   name='VarianceNorm',
-  full_name='TensorFiller.VarianceNorm',
+  full_name='dragon.TensorFiller.VarianceNorm',
   filename=None,
   filename=None,
   file=DESCRIPTOR,
   file=DESCRIPTOR,
   values=[
   values=[
@@ -110,63 +110,63 @@ _TENSORFILLER_VARIANCENORM = _descriptor.EnumDescriptor(
   ],
   ],
   containing_type=None,
   containing_type=None,
   options=None,
   options=None,
-  serialized_start=1062,
-  serialized_end=1114,
+  serialized_start=1119,
+  serialized_end=1171,
 )
 )
 _sym_db.RegisterEnumDescriptor(_TENSORFILLER_VARIANCENORM)
 _sym_db.RegisterEnumDescriptor(_TENSORFILLER_VARIANCENORM)
 
 
 
 
 _TENSORPROTO = _descriptor.Descriptor(
 _TENSORPROTO = _descriptor.Descriptor(
   name='TensorProto',
   name='TensorProto',
-  full_name='TensorProto',
+  full_name='dragon.TensorProto',
   filename=None,
   filename=None,
   file=DESCRIPTOR,
   file=DESCRIPTOR,
   containing_type=None,
   containing_type=None,
   fields=[
   fields=[
     _descriptor.FieldDescriptor(
     _descriptor.FieldDescriptor(
-      name='dims', full_name='TensorProto.dims', index=0,
+      name='dims', full_name='dragon.TensorProto.dims', index=0,
       number=1, type=5, cpp_type=1, label=3,
       number=1, type=5, cpp_type=1, label=3,
       has_default_value=False, default_value=[],
       has_default_value=False, default_value=[],
       message_type=None, enum_type=None, containing_type=None,
       message_type=None, enum_type=None, containing_type=None,
       is_extension=False, extension_scope=None,
       is_extension=False, extension_scope=None,
       options=None),
       options=None),
     _descriptor.FieldDescriptor(
     _descriptor.FieldDescriptor(
-      name='data_type', full_name='TensorProto.data_type', index=1,
+      name='data_type', full_name='dragon.TensorProto.data_type', index=1,
       number=2, type=14, cpp_type=8, label=1,
       number=2, type=14, cpp_type=8, label=1,
       has_default_value=True, default_value=1,
       has_default_value=True, default_value=1,
       message_type=None, enum_type=None, containing_type=None,
       message_type=None, enum_type=None, containing_type=None,
       is_extension=False, extension_scope=None,
       is_extension=False, extension_scope=None,
       options=None),
       options=None),
     _descriptor.FieldDescriptor(
     _descriptor.FieldDescriptor(
-      name='float_data', full_name='TensorProto.float_data', index=2,
+      name='float_data', full_name='dragon.TensorProto.float_data', index=2,
       number=3, type=2, cpp_type=6, label=3,
       number=3, type=2, cpp_type=6, label=3,
       has_default_value=False, default_value=[],
       has_default_value=False, default_value=[],
       message_type=None, enum_type=None, containing_type=None,
       message_type=None, enum_type=None, containing_type=None,
       is_extension=False, extension_scope=None,
       is_extension=False, extension_scope=None,
       options=_descriptor._ParseOptions(descriptor_pb2.FieldOptions(), _b('\020\001'))),
       options=_descriptor._ParseOptions(descriptor_pb2.FieldOptions(), _b('\020\001'))),
     _descriptor.FieldDescriptor(
     _descriptor.FieldDescriptor(
-      name='int32_data', full_name='TensorProto.int32_data', index=3,
+      name='int32_data', full_name='dragon.TensorProto.int32_data', index=3,
       number=4, type=5, cpp_type=1, label=3,
       number=4, type=5, cpp_type=1, label=3,
       has_default_value=False, default_value=[],
       has_default_value=False, default_value=[],
       message_type=None, enum_type=None, containing_type=None,
       message_type=None, enum_type=None, containing_type=None,
       is_extension=False, extension_scope=None,
       is_extension=False, extension_scope=None,
       options=_descriptor._ParseOptions(descriptor_pb2.FieldOptions(), _b('\020\001'))),
       options=_descriptor._ParseOptions(descriptor_pb2.FieldOptions(), _b('\020\001'))),
     _descriptor.FieldDescriptor(
     _descriptor.FieldDescriptor(
-      name='byte_data', full_name='TensorProto.byte_data', index=4,
+      name='byte_data', full_name='dragon.TensorProto.byte_data', index=4,
       number=5, type=12, cpp_type=9, label=1,
       number=5, type=12, cpp_type=9, label=1,
       has_default_value=False, default_value=_b(""),
       has_default_value=False, default_value=_b(""),
       message_type=None, enum_type=None, containing_type=None,
       message_type=None, enum_type=None, containing_type=None,
       is_extension=False, extension_scope=None,
       is_extension=False, extension_scope=None,
       options=None),
       options=None),
     _descriptor.FieldDescriptor(
     _descriptor.FieldDescriptor(
-      name='string_data', full_name='TensorProto.string_data', index=5,
+      name='string_data', full_name='dragon.TensorProto.string_data', index=5,
       number=6, type=12, cpp_type=9, label=3,
       number=6, type=12, cpp_type=9, label=3,
       has_default_value=False, default_value=[],
       has_default_value=False, default_value=[],
       message_type=None, enum_type=None, containing_type=None,
       message_type=None, enum_type=None, containing_type=None,
       is_extension=False, extension_scope=None,
       is_extension=False, extension_scope=None,
       options=None),
       options=None),
     _descriptor.FieldDescriptor(
     _descriptor.FieldDescriptor(
-      name='name', full_name='TensorProto.name', index=6,
+      name='name', full_name='dragon.TensorProto.name', index=6,
       number=7, type=9, cpp_type=9, label=1,
       number=7, type=9, cpp_type=9, label=1,
       has_default_value=False, default_value=_b("").decode('utf-8'),
       has_default_value=False, default_value=_b("").decode('utf-8'),
       message_type=None, enum_type=None, containing_type=None,
       message_type=None, enum_type=None, containing_type=None,
@@ -184,20 +184,20 @@ _TENSORPROTO = _descriptor.Descriptor(
   extension_ranges=[],
   extension_ranges=[],
   oneofs=[
   oneofs=[
   ],
   ],
-  serialized_start=17,
-  serialized_end=264,
+  serialized_start=25,
+  serialized_end=279,
 )
 )
 
 
 
 
 _TENSORPROTOS = _descriptor.Descriptor(
 _TENSORPROTOS = _descriptor.Descriptor(
   name='TensorProtos',
   name='TensorProtos',
-  full_name='TensorProtos',
+  full_name='dragon.TensorProtos',
   filename=None,
   filename=None,
   file=DESCRIPTOR,
   file=DESCRIPTOR,
   containing_type=None,
   containing_type=None,
   fields=[
   fields=[
     _descriptor.FieldDescriptor(
     _descriptor.FieldDescriptor(
-      name='protos', full_name='TensorProtos.protos', index=0,
+      name='protos', full_name='dragon.TensorProtos.protos', index=0,
       number=1, type=11, cpp_type=10, label=3,
       number=1, type=11, cpp_type=10, label=3,
       has_default_value=False, default_value=[],
       has_default_value=False, default_value=[],
       message_type=None, enum_type=None, containing_type=None,
       message_type=None, enum_type=None, containing_type=None,
@@ -214,76 +214,76 @@ _TENSORPROTOS = _descriptor.Descriptor(
   extension_ranges=[],
   extension_ranges=[],
   oneofs=[
   oneofs=[
   ],
   ],
-  serialized_start=266,
-  serialized_end=310,
+  serialized_start=281,
+  serialized_end=332,
 )
 )
 
 
 
 
 _ARGUMENT = _descriptor.Descriptor(
 _ARGUMENT = _descriptor.Descriptor(
   name='Argument',
   name='Argument',
-  full_name='Argument',
+  full_name='dragon.Argument',
   filename=None,
   filename=None,
   file=DESCRIPTOR,
   file=DESCRIPTOR,
   containing_type=None,
   containing_type=None,
   fields=[
   fields=[
     _descriptor.FieldDescriptor(
     _descriptor.FieldDescriptor(
-      name='name', full_name='Argument.name', index=0,
+      name='name', full_name='dragon.Argument.name', index=0,
       number=1, type=9, cpp_type=9, label=1,
       number=1, type=9, cpp_type=9, label=1,
       has_default_value=False, default_value=_b("").decode('utf-8'),
       has_default_value=False, default_value=_b("").decode('utf-8'),
       message_type=None, enum_type=None, containing_type=None,
       message_type=None, enum_type=None, containing_type=None,
       is_extension=False, extension_scope=None,
       is_extension=False, extension_scope=None,
       options=None),
       options=None),
     _descriptor.FieldDescriptor(
     _descriptor.FieldDescriptor(
-      name='f', full_name='Argument.f', index=1,
+      name='f', full_name='dragon.Argument.f', index=1,
       number=2, type=2, cpp_type=6, label=1,
       number=2, type=2, cpp_type=6, label=1,
       has_default_value=False, default_value=0,
       has_default_value=False, default_value=0,
       message_type=None, enum_type=None, containing_type=None,
       message_type=None, enum_type=None, containing_type=None,
       is_extension=False, extension_scope=None,
       is_extension=False, extension_scope=None,
       options=None),
       options=None),
     _descriptor.FieldDescriptor(
     _descriptor.FieldDescriptor(
-      name='i', full_name='Argument.i', index=2,
+      name='i', full_name='dragon.Argument.i', index=2,
       number=3, type=5, cpp_type=1, label=1,
       number=3, type=5, cpp_type=1, label=1,
       has_default_value=False, default_value=0,
       has_default_value=False, default_value=0,
       message_type=None, enum_type=None, containing_type=None,
       message_type=None, enum_type=None, containing_type=None,
       is_extension=False, extension_scope=None,
       is_extension=False, extension_scope=None,
       options=None),
       options=None),
     _descriptor.FieldDescriptor(
     _descriptor.FieldDescriptor(
-      name='i64', full_name='Argument.i64', index=3,
+      name='i64', full_name='dragon.Argument.i64', index=3,
       number=9, type=3, cpp_type=2, label=1,
       number=9, type=3, cpp_type=2, label=1,
       has_default_value=False, default_value=0,
       has_default_value=False, default_value=0,
       message_type=None, enum_type=None, containing_type=None,
       message_type=None, enum_type=None, containing_type=None,
       is_extension=False, extension_scope=None,
       is_extension=False, extension_scope=None,
       options=None),
       options=None),
     _descriptor.FieldDescriptor(
     _descriptor.FieldDescriptor(
-      name='s', full_name='Argument.s', index=4,
+      name='s', full_name='dragon.Argument.s', index=4,
       number=4, type=9, cpp_type=9, label=1,
       number=4, type=9, cpp_type=9, label=1,
       has_default_value=False, default_value=_b("").decode('utf-8'),
       has_default_value=False, default_value=_b("").decode('utf-8'),
       message_type=None, enum_type=None, containing_type=None,
       message_type=None, enum_type=None, containing_type=None,
       is_extension=False, extension_scope=None,
       is_extension=False, extension_scope=None,
       options=None),
       options=None),
     _descriptor.FieldDescriptor(
     _descriptor.FieldDescriptor(
-      name='b', full_name='Argument.b', index=5,
+      name='b', full_name='dragon.Argument.b', index=5,
       number=8, type=8, cpp_type=7, label=1,
       number=8, type=8, cpp_type=7, label=1,
       has_default_value=False, default_value=False,
       has_default_value=False, default_value=False,
       message_type=None, enum_type=None, containing_type=None,
       message_type=None, enum_type=None, containing_type=None,
       is_extension=False, extension_scope=None,
       is_extension=False, extension_scope=None,
       options=None),
       options=None),
     _descriptor.FieldDescriptor(
     _descriptor.FieldDescriptor(
-      name='floats', full_name='Argument.floats', index=6,
+      name='floats', full_name='dragon.Argument.floats', index=6,
       number=5, type=2, cpp_type=6, label=3,
       number=5, type=2, cpp_type=6, label=3,
       has_default_value=False, default_value=[],
       has_default_value=False, default_value=[],
       message_type=None, enum_type=None, containing_type=None,
       message_type=None, enum_type=None, containing_type=None,
       is_extension=False, extension_scope=None,
       is_extension=False, extension_scope=None,
       options=None),
       options=None),
     _descriptor.FieldDescriptor(
     _descriptor.FieldDescriptor(
-      name='ints', full_name='Argument.ints', index=7,
+      name='ints', full_name='dragon.Argument.ints', index=7,
       number=6, type=5, cpp_type=1, label=3,
       number=6, type=5, cpp_type=1, label=3,
       has_default_value=False, default_value=[],
       has_default_value=False, default_value=[],
       message_type=None, enum_type=None, containing_type=None,
       message_type=None, enum_type=None, containing_type=None,
       is_extension=False, extension_scope=None,
       is_extension=False, extension_scope=None,
       options=None),
       options=None),
     _descriptor.FieldDescriptor(
     _descriptor.FieldDescriptor(
-      name='strings', full_name='Argument.strings', index=8,
+      name='strings', full_name='dragon.Argument.strings', index=8,
       number=7, type=9, cpp_type=9, label=3,
       number=7, type=9, cpp_type=9, label=3,
       has_default_value=False, default_value=[],
       has_default_value=False, default_value=[],
       message_type=None, enum_type=None, containing_type=None,
       message_type=None, enum_type=None, containing_type=None,
@@ -300,41 +300,41 @@ _ARGUMENT = _descriptor.Descriptor(
   extension_ranges=[],
   extension_ranges=[],
   oneofs=[
   oneofs=[
   ],
   ],
-  serialized_start=313,
-  serialized_end=441,
+  serialized_start=335,
+  serialized_end=463,
 )
 )
 
 
 
 
 _DEVICEOPTION = _descriptor.Descriptor(
 _DEVICEOPTION = _descriptor.Descriptor(
   name='DeviceOption',
   name='DeviceOption',
-  full_name='DeviceOption',
+  full_name='dragon.DeviceOption',
   filename=None,
   filename=None,
   file=DESCRIPTOR,
   file=DESCRIPTOR,
   containing_type=None,
   containing_type=None,
   fields=[
   fields=[
     _descriptor.FieldDescriptor(
     _descriptor.FieldDescriptor(
-      name='device_type', full_name='DeviceOption.device_type', index=0,
+      name='device_type', full_name='dragon.DeviceOption.device_type', index=0,
       number=1, type=14, cpp_type=8, label=1,
       number=1, type=14, cpp_type=8, label=1,
       has_default_value=True, default_value=0,
       has_default_value=True, default_value=0,
       message_type=None, enum_type=None, containing_type=None,
       message_type=None, enum_type=None, containing_type=None,
       is_extension=False, extension_scope=None,
       is_extension=False, extension_scope=None,
       options=None),
       options=None),
     _descriptor.FieldDescriptor(
     _descriptor.FieldDescriptor(
-      name='device_id', full_name='DeviceOption.device_id', index=1,
+      name='device_id', full_name='dragon.DeviceOption.device_id', index=1,
       number=2, type=5, cpp_type=1, label=1,
       number=2, type=5, cpp_type=1, label=1,
       has_default_value=True, default_value=0,
       has_default_value=True, default_value=0,
       message_type=None, enum_type=None, containing_type=None,
       message_type=None, enum_type=None, containing_type=None,
       is_extension=False, extension_scope=None,
       is_extension=False, extension_scope=None,
       options=None),
       options=None),
     _descriptor.FieldDescriptor(
     _descriptor.FieldDescriptor(
-      name='random_seed', full_name='DeviceOption.random_seed', index=2,
+      name='random_seed', full_name='dragon.DeviceOption.random_seed', index=2,
       number=3, type=13, cpp_type=3, label=1,
       number=3, type=13, cpp_type=3, label=1,
       has_default_value=True, default_value=3,
       has_default_value=True, default_value=3,
       message_type=None, enum_type=None, containing_type=None,
       message_type=None, enum_type=None, containing_type=None,
       is_extension=False, extension_scope=None,
       is_extension=False, extension_scope=None,
       options=None),
       options=None),
     _descriptor.FieldDescriptor(
     _descriptor.FieldDescriptor(
-      name='engine', full_name='DeviceOption.engine', index=3,
+      name='engine', full_name='dragon.DeviceOption.engine', index=3,
       number=4, type=9, cpp_type=9, label=1,
       number=4, type=9, cpp_type=9, label=1,
       has_default_value=False, default_value=_b("").decode('utf-8'),
       has_default_value=False, default_value=_b("").decode('utf-8'),
       message_type=None, enum_type=None, containing_type=None,
       message_type=None, enum_type=None, containing_type=None,
@@ -351,55 +351,55 @@ _DEVICEOPTION = _descriptor.Descriptor(
   extension_ranges=[],
   extension_ranges=[],
   oneofs=[
   oneofs=[
   ],
   ],
-  serialized_start=443,
-  serialized_end=558,
+  serialized_start=465,
+  serialized_end=587,
 )
 )
 
 
 
 
 _OPERATORDEF = _descriptor.Descriptor(
 _OPERATORDEF = _descriptor.Descriptor(
   name='OperatorDef',
   name='OperatorDef',
-  full_name='OperatorDef',
+  full_name='dragon.OperatorDef',
   filename=None,
   filename=None,
   file=DESCRIPTOR,
   file=DESCRIPTOR,
   containing_type=None,
   containing_type=None,
   fields=[
   fields=[
     _descriptor.FieldDescriptor(
     _descriptor.FieldDescriptor(
-      name='input', full_name='OperatorDef.input', index=0,
+      name='input', full_name='dragon.OperatorDef.input', index=0,
       number=1, type=9, cpp_type=9, label=3,
       number=1, type=9, cpp_type=9, label=3,
       has_default_value=False, default_value=[],
       has_default_value=False, default_value=[],
       message_type=None, enum_type=None, containing_type=None,
       message_type=None, enum_type=None, containing_type=None,
       is_extension=False, extension_scope=None,
       is_extension=False, extension_scope=None,
       options=None),
       options=None),
     _descriptor.FieldDescriptor(
     _descriptor.FieldDescriptor(
-      name='output', full_name='OperatorDef.output', index=1,
+      name='output', full_name='dragon.OperatorDef.output', index=1,
       number=2, type=9, cpp_type=9, label=3,
       number=2, type=9, cpp_type=9, label=3,
       has_default_value=False, default_value=[],
       has_default_value=False, default_value=[],
       message_type=None, enum_type=None, containing_type=None,
       message_type=None, enum_type=None, containing_type=None,
       is_extension=False, extension_scope=None,
       is_extension=False, extension_scope=None,
       options=None),
       options=None),
     _descriptor.FieldDescriptor(
     _descriptor.FieldDescriptor(
-      name='name', full_name='OperatorDef.name', index=2,
+      name='name', full_name='dragon.OperatorDef.name', index=2,
       number=3, type=9, cpp_type=9, label=1,
       number=3, type=9, cpp_type=9, label=1,
       has_default_value=False, default_value=_b("").decode('utf-8'),
       has_default_value=False, default_value=_b("").decode('utf-8'),
       message_type=None, enum_type=None, containing_type=None,
       message_type=None, enum_type=None, containing_type=None,
       is_extension=False, extension_scope=None,
       is_extension=False, extension_scope=None,
       options=None),
       options=None),
     _descriptor.FieldDescriptor(
     _descriptor.FieldDescriptor(
-      name='type', full_name='OperatorDef.type', index=3,
+      name='type', full_name='dragon.OperatorDef.type', index=3,
       number=4, type=9, cpp_type=9, label=1,
       number=4, type=9, cpp_type=9, label=1,
       has_default_value=False, default_value=_b("").decode('utf-8'),
       has_default_value=False, default_value=_b("").decode('utf-8'),
       message_type=None, enum_type=None, containing_type=None,
       message_type=None, enum_type=None, containing_type=None,
       is_extension=False, extension_scope=None,
       is_extension=False, extension_scope=None,
       options=None),
       options=None),
     _descriptor.FieldDescriptor(
     _descriptor.FieldDescriptor(
-      name='arg', full_name='OperatorDef.arg', index=4,
+      name='arg', full_name='dragon.OperatorDef.arg', index=4,
       number=5, type=11, cpp_type=10, label=3,
       number=5, type=11, cpp_type=10, label=3,
       has_default_value=False, default_value=[],
       has_default_value=False, default_value=[],
       message_type=None, enum_type=None, containing_type=None,
       message_type=None, enum_type=None, containing_type=None,
       is_extension=False, extension_scope=None,
       is_extension=False, extension_scope=None,
       options=None),
       options=None),
     _descriptor.FieldDescriptor(
     _descriptor.FieldDescriptor(
-      name='device_option', full_name='OperatorDef.device_option', index=5,
+      name='device_option', full_name='dragon.OperatorDef.device_option', index=5,
       number=6, type=11, cpp_type=10, label=1,
       number=6, type=11, cpp_type=10, label=1,
       has_default_value=False, default_value=None,
       has_default_value=False, default_value=None,
       message_type=None, enum_type=None, containing_type=None,
       message_type=None, enum_type=None, containing_type=None,
@@ -416,34 +416,34 @@ _OPERATORDEF = _descriptor.Descriptor(
   extension_ranges=[],
   extension_ranges=[],
   oneofs=[
   oneofs=[
   ],
   ],
-  serialized_start=561,
-  serialized_end=695,
+  serialized_start=590,
+  serialized_end=738,
 )
 )
 
 
 
 
 _GRADIENTTARGET = _descriptor.Descriptor(
 _GRADIENTTARGET = _descriptor.Descriptor(
   name='GradientTarget',
   name='GradientTarget',
-  full_name='GradientTarget',
+  full_name='dragon.GradientTarget',
   filename=None,
   filename=None,
   file=DESCRIPTOR,
   file=DESCRIPTOR,
   containing_type=None,
   containing_type=None,
   fields=[
   fields=[
     _descriptor.FieldDescriptor(
     _descriptor.FieldDescriptor(
-      name='cost', full_name='GradientTarget.cost', index=0,
+      name='cost', full_name='dragon.GradientTarget.cost', index=0,
       number=1, type=9, cpp_type=9, label=1,
       number=1, type=9, cpp_type=9, label=1,
       has_default_value=False, default_value=_b("").decode('utf-8'),
       has_default_value=False, default_value=_b("").decode('utf-8'),
       message_type=None, enum_type=None, containing_type=None,
       message_type=None, enum_type=None, containing_type=None,
       is_extension=False, extension_scope=None,
       is_extension=False, extension_scope=None,
       options=None),
       options=None),
     _descriptor.FieldDescriptor(
     _descriptor.FieldDescriptor(
-      name='wrt', full_name='GradientTarget.wrt', index=1,
+      name='wrt', full_name='dragon.GradientTarget.wrt', index=1,
       number=2, type=9, cpp_type=9, label=1,
       number=2, type=9, cpp_type=9, label=1,
       has_default_value=False, default_value=_b("").decode('utf-8'),
       has_default_value=False, default_value=_b("").decode('utf-8'),
       message_type=None, enum_type=None, containing_type=None,
       message_type=None, enum_type=None, containing_type=None,
       is_extension=False, extension_scope=None,
       is_extension=False, extension_scope=None,
       options=None),
       options=None),
     _descriptor.FieldDescriptor(
     _descriptor.FieldDescriptor(
-      name='external', full_name='GradientTarget.external', index=2,
+      name='external', full_name='dragon.GradientTarget.external', index=2,
       number=3, type=9, cpp_type=9, label=1,
       number=3, type=9, cpp_type=9, label=1,
       has_default_value=False, default_value=_b("").decode('utf-8'),
       has_default_value=False, default_value=_b("").decode('utf-8'),
       message_type=None, enum_type=None, containing_type=None,
       message_type=None, enum_type=None, containing_type=None,
@@ -460,41 +460,41 @@ _GRADIENTTARGET = _descriptor.Descriptor(
   extension_ranges=[],
   extension_ranges=[],
   oneofs=[
   oneofs=[
   ],
   ],
-  serialized_start=697,
-  serialized_end=758,
+  serialized_start=740,
+  serialized_end=801,
 )
 )
 
 
 
 
 _UPDATETARGET = _descriptor.Descriptor(
 _UPDATETARGET = _descriptor.Descriptor(
   name='UpdateTarget',
   name='UpdateTarget',
-  full_name='UpdateTarget',
+  full_name='dragon.UpdateTarget',
   filename=None,
   filename=None,
   file=DESCRIPTOR,
   file=DESCRIPTOR,
   containing_type=None,
   containing_type=None,
   fields=[
   fields=[
     _descriptor.FieldDescriptor(
     _descriptor.FieldDescriptor(
-      name='name', full_name='UpdateTarget.name', index=0,
+      name='name', full_name='dragon.UpdateTarget.name', index=0,
       number=1, type=9, cpp_type=9, label=1,
       number=1, type=9, cpp_type=9, label=1,
       has_default_value=False, default_value=_b("").decode('utf-8'),
       has_default_value=False, default_value=_b("").decode('utf-8'),
       message_type=None, enum_type=None, containing_type=None,
       message_type=None, enum_type=None, containing_type=None,
       is_extension=False, extension_scope=None,
       is_extension=False, extension_scope=None,
       options=None),
       options=None),
     _descriptor.FieldDescriptor(
     _descriptor.FieldDescriptor(
-      name='type', full_name='UpdateTarget.type', index=1,
+      name='type', full_name='dragon.UpdateTarget.type', index=1,
       number=2, type=9, cpp_type=9, label=1,
       number=2, type=9, cpp_type=9, label=1,
       has_default_value=False, default_value=_b("").decode('utf-8'),
       has_default_value=False, default_value=_b("").decode('utf-8'),
       message_type=None, enum_type=None, containing_type=None,
       message_type=None, enum_type=None, containing_type=None,
       is_extension=False, extension_scope=None,
       is_extension=False, extension_scope=None,
       options=None),
       options=None),
     _descriptor.FieldDescriptor(
     _descriptor.FieldDescriptor(
-      name='tensor', full_name='UpdateTarget.tensor', index=2,
+      name='tensor', full_name='dragon.UpdateTarget.tensor', index=2,
       number=3, type=9, cpp_type=9, label=3,
       number=3, type=9, cpp_type=9, label=3,
       has_default_value=False, default_value=[],
       has_default_value=False, default_value=[],
       message_type=None, enum_type=None, containing_type=None,
       message_type=None, enum_type=None, containing_type=None,
       is_extension=False, extension_scope=None,
       is_extension=False, extension_scope=None,
       options=None),
       options=None),
     _descriptor.FieldDescriptor(
     _descriptor.FieldDescriptor(
-      name='arg', full_name='UpdateTarget.arg', index=3,
+      name='arg', full_name='dragon.UpdateTarget.arg', index=3,
       number=4, type=11, cpp_type=10, label=3,
       number=4, type=11, cpp_type=10, label=3,
       has_default_value=False, default_value=[],
       has_default_value=False, default_value=[],
       message_type=None, enum_type=None, containing_type=None,
       message_type=None, enum_type=None, containing_type=None,
@@ -511,76 +511,76 @@ _UPDATETARGET = _descriptor.Descriptor(
   extension_ranges=[],
   extension_ranges=[],
   oneofs=[
   oneofs=[
   ],
   ],
-  serialized_start=760,
-  serialized_end=842,
+  serialized_start=803,
+  serialized_end=892,
 )
 )
 
 
 
 
 _TENSORFILLER = _descriptor.Descriptor(
 _TENSORFILLER = _descriptor.Descriptor(
   name='TensorFiller',
   name='TensorFiller',
-  full_name='TensorFiller',
+  full_name='dragon.TensorFiller',
   filename=None,
   filename=None,
   file=DESCRIPTOR,
   file=DESCRIPTOR,
   containing_type=None,
   containing_type=None,
   fields=[
   fields=[
     _descriptor.FieldDescriptor(
     _descriptor.FieldDescriptor(
-      name='tensor', full_name='TensorFiller.tensor', index=0,
+      name='tensor', full_name='dragon.TensorFiller.tensor', index=0,
       number=1, type=9, cpp_type=9, label=1,
       number=1, type=9, cpp_type=9, label=1,
       has_default_value=False, default_value=_b("").decode('utf-8'),
       has_default_value=False, default_value=_b("").decode('utf-8'),
       message_type=None, enum_type=None, containing_type=None,
       message_type=None, enum_type=None, containing_type=None,
       is_extension=False, extension_scope=None,
       is_extension=False, extension_scope=None,
       options=None),
       options=None),
     _descriptor.FieldDescriptor(
     _descriptor.FieldDescriptor(
-      name='type', full_name='TensorFiller.type', index=1,
+      name='type', full_name='dragon.TensorFiller.type', index=1,
       number=2, type=9, cpp_type=9, label=1,
       number=2, type=9, cpp_type=9, label=1,
       has_default_value=True, default_value=_b("constant").decode('utf-8'),
       has_default_value=True, default_value=_b("constant").decode('utf-8'),
       message_type=None, enum_type=None, containing_type=None,
       message_type=None, enum_type=None, containing_type=None,
       is_extension=False, extension_scope=None,
       is_extension=False, extension_scope=None,
       options=None),
       options=None),
     _descriptor.FieldDescriptor(
     _descriptor.FieldDescriptor(
-      name='value', full_name='TensorFiller.value', index=2,
+      name='value', full_name='dragon.TensorFiller.value', index=2,
       number=3, type=2, cpp_type=6, label=1,
       number=3, type=2, cpp_type=6, label=1,
       has_default_value=True, default_value=0,
       has_default_value=True, default_value=0,
       message_type=None, enum_type=None, containing_type=None,
       message_type=None, enum_type=None, containing_type=None,
       is_extension=False, extension_scope=None,
       is_extension=False, extension_scope=None,
       options=None),
       options=None),
     _descriptor.FieldDescriptor(
     _descriptor.FieldDescriptor(
-      name='low', full_name='TensorFiller.low', index=3,
+      name='low', full_name='dragon.TensorFiller.low', index=3,
       number=4, type=2, cpp_type=6, label=1,
       number=4, type=2, cpp_type=6, label=1,
       has_default_value=True, default_value=0,
       has_default_value=True, default_value=0,
       message_type=None, enum_type=None, containing_type=None,
       message_type=None, enum_type=None, containing_type=None,
       is_extension=False, extension_scope=None,
       is_extension=False, extension_scope=None,
       options=None),
       options=None),
     _descriptor.FieldDescriptor(
     _descriptor.FieldDescriptor(
-      name='high', full_name='TensorFiller.high', index=4,
+      name='high', full_name='dragon.TensorFiller.high', index=4,
       number=5, type=2, cpp_type=6, label=1,
       number=5, type=2, cpp_type=6, label=1,
       has_default_value=True, default_value=1,
       has_default_value=True, default_value=1,
       message_type=None, enum_type=None, containing_type=None,
       message_type=None, enum_type=None, containing_type=None,
       is_extension=False, extension_scope=None,
       is_extension=False, extension_scope=None,
       options=None),
       options=None),
     _descriptor.FieldDescriptor(
     _descriptor.FieldDescriptor(
-      name='mean', full_name='TensorFiller.mean', index=5,
+      name='mean', full_name='dragon.TensorFiller.mean', index=5,
       number=6, type=2, cpp_type=6, label=1,
       number=6, type=2, cpp_type=6, label=1,
       has_default_value=True, default_value=0,
       has_default_value=True, default_value=0,
       message_type=None, enum_type=None, containing_type=None,
       message_type=None, enum_type=None, containing_type=None,
       is_extension=False, extension_scope=None,
       is_extension=False, extension_scope=None,
       options=None),
       options=None),
     _descriptor.FieldDescriptor(
     _descriptor.FieldDescriptor(
-      name='std', full_name='TensorFiller.std', index=6,
+      name='std', full_name='dragon.TensorFiller.std', index=6,
       number=7, type=2, cpp_type=6, label=1,
       number=7, type=2, cpp_type=6, label=1,
       has_default_value=True, default_value=1,
       has_default_value=True, default_value=1,
       message_type=None, enum_type=None, containing_type=None,
       message_type=None, enum_type=None, containing_type=None,
       is_extension=False, extension_scope=None,
       is_extension=False, extension_scope=None,
       options=None),
       options=None),
     _descriptor.FieldDescriptor(
     _descriptor.FieldDescriptor(
-      name='scale', full_name='TensorFiller.scale', index=7,
+      name='scale', full_name='dragon.TensorFiller.scale', index=7,
       number=8, type=2, cpp_type=6, label=1,
       number=8, type=2, cpp_type=6, label=1,
       has_default_value=True, default_value=3,
       has_default_value=True, default_value=3,
       message_type=None, enum_type=None, containing_type=None,
       message_type=None, enum_type=None, containing_type=None,
       is_extension=False, extension_scope=None,
       is_extension=False, extension_scope=None,
       options=None),
       options=None),
     _descriptor.FieldDescriptor(
     _descriptor.FieldDescriptor(
-      name='variance_norm', full_name='TensorFiller.variance_norm', index=8,
+      name='variance_norm', full_name='dragon.TensorFiller.variance_norm', index=8,
       number=9, type=14, cpp_type=8, label=1,
       number=9, type=14, cpp_type=8, label=1,
       has_default_value=True, default_value=0,
       has_default_value=True, default_value=0,
       message_type=None, enum_type=None, containing_type=None,
       message_type=None, enum_type=None, containing_type=None,
@@ -598,69 +598,69 @@ _TENSORFILLER = _descriptor.Descriptor(
   extension_ranges=[],
   extension_ranges=[],
   oneofs=[
   oneofs=[
   ],
   ],
-  serialized_start=845,
-  serialized_end=1114,
+  serialized_start=895,
+  serialized_end=1171,
 )
 )
 
 
 
 
 _GRAPHDEF = _descriptor.Descriptor(
 _GRAPHDEF = _descriptor.Descriptor(
   name='GraphDef',
   name='GraphDef',
-  full_name='GraphDef',
+  full_name='dragon.GraphDef',
   filename=None,
   filename=None,
   file=DESCRIPTOR,
   file=DESCRIPTOR,
   containing_type=None,
   containing_type=None,
   fields=[
   fields=[
     _descriptor.FieldDescriptor(
     _descriptor.FieldDescriptor(
-      name='name', full_name='GraphDef.name', index=0,
+      name='name', full_name='dragon.GraphDef.name', index=0,
       number=1, type=9, cpp_type=9, label=1,
       number=1, type=9, cpp_type=9, label=1,
       has_default_value=False, default_value=_b("").decode('utf-8'),
       has_default_value=False, default_value=_b("").decode('utf-8'),
       message_type=None, enum_type=None, containing_type=None,
       message_type=None, enum_type=None, containing_type=None,
       is_extension=False, extension_scope=None,
       is_extension=False, extension_scope=None,
       options=None),
       options=None),
     _descriptor.FieldDescriptor(
     _descriptor.FieldDescriptor(
-      name='op', full_name='GraphDef.op', index=1,
+      name='op', full_name='dragon.GraphDef.op', index=1,
       number=2, type=11, cpp_type=10, label=3,
       number=2, type=11, cpp_type=10, label=3,
       has_default_value=False, default_value=[],
       has_default_value=False, default_value=[],
       message_type=None, enum_type=None, containing_type=None,
       message_type=None, enum_type=None, containing_type=None,
       is_extension=False, extension_scope=None,
       is_extension=False, extension_scope=None,
       options=None),
       options=None),
     _descriptor.FieldDescriptor(
     _descriptor.FieldDescriptor(
-      name='graph_type', full_name='GraphDef.graph_type', index=2,
+      name='graph_type', full_name='dragon.GraphDef.graph_type', index=2,
       number=3, type=9, cpp_type=9, label=1,
       number=3, type=9, cpp_type=9, label=1,
       has_default_value=False, default_value=_b("").decode('utf-8'),
       has_default_value=False, default_value=_b("").decode('utf-8'),
       message_type=None, enum_type=None, containing_type=None,
       message_type=None, enum_type=None, containing_type=None,
       is_extension=False, extension_scope=None,
       is_extension=False, extension_scope=None,
       options=None),
       options=None),
     _descriptor.FieldDescriptor(
     _descriptor.FieldDescriptor(
-      name='device_option', full_name='GraphDef.device_option', index=3,
+      name='device_option', full_name='dragon.GraphDef.device_option', index=3,
       number=5, type=11, cpp_type=10, label=1,
       number=5, type=11, cpp_type=10, label=1,
       has_default_value=False, default_value=None,
       has_default_value=False, default_value=None,
       message_type=None, enum_type=None, containing_type=None,
       message_type=None, enum_type=None, containing_type=None,
       is_extension=False, extension_scope=None,
       is_extension=False, extension_scope=None,
       options=None),
       options=None),
     _descriptor.FieldDescriptor(
     _descriptor.FieldDescriptor(
-      name='arg', full_name='GraphDef.arg', index=4,
+      name='arg', full_name='dragon.GraphDef.arg', index=4,
       number=6, type=11, cpp_type=10, label=3,
       number=6, type=11, cpp_type=10, label=3,
       has_default_value=False, default_value=[],
       has_default_value=False, default_value=[],
       message_type=None, enum_type=None, containing_type=None,
       message_type=None, enum_type=None, containing_type=None,
       is_extension=False, extension_scope=None,
       is_extension=False, extension_scope=None,
       options=None),
       options=None),
     _descriptor.FieldDescriptor(
     _descriptor.FieldDescriptor(
-      name='target', full_name='GraphDef.target', index=5,
+      name='target', full_name='dragon.GraphDef.target', index=5,
       number=7, type=9, cpp_type=9, label=3,
       number=7, type=9, cpp_type=9, label=3,
       has_default_value=False, default_value=[],
       has_default_value=False, default_value=[],
       message_type=None, enum_type=None, containing_type=None,
       message_type=None, enum_type=None, containing_type=None,
       is_extension=False, extension_scope=None,
       is_extension=False, extension_scope=None,
       options=None),
       options=None),
     _descriptor.FieldDescriptor(
     _descriptor.FieldDescriptor(
-      name='g_target', full_name='GraphDef.g_target', index=6,
+      name='g_target', full_name='dragon.GraphDef.g_target', index=6,
       number=8, type=11, cpp_type=10, label=3,
       number=8, type=11, cpp_type=10, label=3,
       has_default_value=False, default_value=[],
       has_default_value=False, default_value=[],
       message_type=None, enum_type=None, containing_type=None,
       message_type=None, enum_type=None, containing_type=None,
       is_extension=False, extension_scope=None,
       is_extension=False, extension_scope=None,
       options=None),
       options=None),
     _descriptor.FieldDescriptor(
     _descriptor.FieldDescriptor(
-      name='u_target', full_name='GraphDef.u_target', index=7,
+      name='u_target', full_name='dragon.GraphDef.u_target', index=7,
       number=9, type=11, cpp_type=10, label=3,
       number=9, type=11, cpp_type=10, label=3,
       has_default_value=False, default_value=[],
       has_default_value=False, default_value=[],
       message_type=None, enum_type=None, containing_type=None,
       message_type=None, enum_type=None, containing_type=None,
@@ -677,8 +677,8 @@ _GRAPHDEF = _descriptor.Descriptor(
   extension_ranges=[],
   extension_ranges=[],
   oneofs=[
   oneofs=[
   ],
   ],
-  serialized_start=1117,
-  serialized_end=1333,
+  serialized_start=1174,
+  serialized_end=1425,
 )
 )
 
 
 _TENSORPROTO.fields_by_name['data_type'].enum_type = _TENSORPROTO_DATATYPE
 _TENSORPROTO.fields_by_name['data_type'].enum_type = _TENSORPROTO_DATATYPE
@@ -709,63 +709,63 @@ DESCRIPTOR.enum_types_by_name['DeviceType'] = _DEVICETYPE
 TensorProto = _reflection.GeneratedProtocolMessageType('TensorProto', (_message.Message,), dict(
 TensorProto = _reflection.GeneratedProtocolMessageType('TensorProto', (_message.Message,), dict(
   DESCRIPTOR = _TENSORPROTO,
   DESCRIPTOR = _TENSORPROTO,
   __module__ = 'dragon_pb2'
   __module__ = 'dragon_pb2'
-  # @@protoc_insertion_point(class_scope:TensorProto)
+  # @@protoc_insertion_point(class_scope:dragon.TensorProto)
   ))
   ))
 _sym_db.RegisterMessage(TensorProto)
 _sym_db.RegisterMessage(TensorProto)
 
 
 TensorProtos = _reflection.GeneratedProtocolMessageType('TensorProtos', (_message.Message,), dict(
 TensorProtos = _reflection.GeneratedProtocolMessageType('TensorProtos', (_message.Message,), dict(
   DESCRIPTOR = _TENSORPROTOS,
   DESCRIPTOR = _TENSORPROTOS,
   __module__ = 'dragon_pb2'
   __module__ = 'dragon_pb2'
-  # @@protoc_insertion_point(class_scope:TensorProtos)
+  # @@protoc_insertion_point(class_scope:dragon.TensorProtos)
   ))
   ))
 _sym_db.RegisterMessage(TensorProtos)
 _sym_db.RegisterMessage(TensorProtos)
 
 
 Argument = _reflection.GeneratedProtocolMessageType('Argument', (_message.Message,), dict(
 Argument = _reflection.GeneratedProtocolMessageType('Argument', (_message.Message,), dict(
   DESCRIPTOR = _ARGUMENT,
   DESCRIPTOR = _ARGUMENT,
   __module__ = 'dragon_pb2'
   __module__ = 'dragon_pb2'
-  # @@protoc_insertion_point(class_scope:Argument)
+  # @@protoc_insertion_point(class_scope:dragon.Argument)
   ))
   ))
 _sym_db.RegisterMessage(Argument)
 _sym_db.RegisterMessage(Argument)
 
 
 DeviceOption = _reflection.GeneratedProtocolMessageType('DeviceOption', (_message.Message,), dict(
 DeviceOption = _reflection.GeneratedProtocolMessageType('DeviceOption', (_message.Message,), dict(
   DESCRIPTOR = _DEVICEOPTION,
   DESCRIPTOR = _DEVICEOPTION,
   __module__ = 'dragon_pb2'
   __module__ = 'dragon_pb2'
-  # @@protoc_insertion_point(class_scope:DeviceOption)
+  # @@protoc_insertion_point(class_scope:dragon.DeviceOption)
   ))
   ))
 _sym_db.RegisterMessage(DeviceOption)
 _sym_db.RegisterMessage(DeviceOption)
 
 
 OperatorDef = _reflection.GeneratedProtocolMessageType('OperatorDef', (_message.Message,), dict(
 OperatorDef = _reflection.GeneratedProtocolMessageType('OperatorDef', (_message.Message,), dict(
   DESCRIPTOR = _OPERATORDEF,
   DESCRIPTOR = _OPERATORDEF,
   __module__ = 'dragon_pb2'
   __module__ = 'dragon_pb2'
-  # @@protoc_insertion_point(class_scope:OperatorDef)
+  # @@protoc_insertion_point(class_scope:dragon.OperatorDef)
   ))
   ))
 _sym_db.RegisterMessage(OperatorDef)
 _sym_db.RegisterMessage(OperatorDef)
 
 
 GradientTarget = _reflection.GeneratedProtocolMessageType('GradientTarget', (_message.Message,), dict(
 GradientTarget = _reflection.GeneratedProtocolMessageType('GradientTarget', (_message.Message,), dict(
   DESCRIPTOR = _GRADIENTTARGET,
   DESCRIPTOR = _GRADIENTTARGET,
   __module__ = 'dragon_pb2'
   __module__ = 'dragon_pb2'
-  # @@protoc_insertion_point(class_scope:GradientTarget)
+  # @@protoc_insertion_point(class_scope:dragon.GradientTarget)
   ))
   ))
 _sym_db.RegisterMessage(GradientTarget)
 _sym_db.RegisterMessage(GradientTarget)
 
 
 UpdateTarget = _reflection.GeneratedProtocolMessageType('UpdateTarget', (_message.Message,), dict(
 UpdateTarget = _reflection.GeneratedProtocolMessageType('UpdateTarget', (_message.Message,), dict(
   DESCRIPTOR = _UPDATETARGET,
   DESCRIPTOR = _UPDATETARGET,
   __module__ = 'dragon_pb2'
   __module__ = 'dragon_pb2'
-  # @@protoc_insertion_point(class_scope:UpdateTarget)
+  # @@protoc_insertion_point(class_scope:dragon.UpdateTarget)
   ))
   ))
 _sym_db.RegisterMessage(UpdateTarget)
 _sym_db.RegisterMessage(UpdateTarget)
 
 
 TensorFiller = _reflection.GeneratedProtocolMessageType('TensorFiller', (_message.Message,), dict(
 TensorFiller = _reflection.GeneratedProtocolMessageType('TensorFiller', (_message.Message,), dict(
   DESCRIPTOR = _TENSORFILLER,
   DESCRIPTOR = _TENSORFILLER,
   __module__ = 'dragon_pb2'
   __module__ = 'dragon_pb2'
-  # @@protoc_insertion_point(class_scope:TensorFiller)
+  # @@protoc_insertion_point(class_scope:dragon.TensorFiller)
   ))
   ))
 _sym_db.RegisterMessage(TensorFiller)
 _sym_db.RegisterMessage(TensorFiller)
 
 
 GraphDef = _reflection.GeneratedProtocolMessageType('GraphDef', (_message.Message,), dict(
 GraphDef = _reflection.GeneratedProtocolMessageType('GraphDef', (_message.Message,), dict(
   DESCRIPTOR = _GRAPHDEF,
   DESCRIPTOR = _GRAPHDEF,
   __module__ = 'dragon_pb2'
   __module__ = 'dragon_pb2'
-  # @@protoc_insertion_point(class_scope:GraphDef)
+  # @@protoc_insertion_point(class_scope:dragon.GraphDef)
   ))
   ))
 _sym_db.RegisterMessage(GraphDef)
 _sym_db.RegisterMessage(GraphDef)
 
 

Dragon/python/dragon/version.py

@@ -14,7 +14,7 @@ from __future__ import division
 from __future__ import print_function
 from __future__ import print_function
 
 
 version = '0.2.2'
 version = '0.2.2'
-full_version = '0.2.2.9'
+full_version = '0.2.2.10'
 release = False
 release = False
 
 
 if not release:
 if not release:

Dragon/python/dragon/vm/torch/module.py

@@ -115,8 +115,8 @@ class Module(object):
     def _load_state_dict_key_mismatch(self, full_name, name, is_missing):
     def _load_state_dict_key_mismatch(self, full_name, name, is_missing):
         pass
         pass
 
 
-    def load_state_dict(self, state_dict, strict=True):
-        logger.info('Load the state dict from numpy arrays.')
+    def load_state_dict(self, state_dict, strict=True, verbose=True):
+        if verbose: logger.info('Load the state dict.')
         def submodule_key_mismatch(full_name, is_missing):
         def submodule_key_mismatch(full_name, is_missing):
             module = self
             module = self
             names = full_name.split(".")
             names = full_name.split(".")
@@ -131,9 +131,6 @@ class Module(object):
         own_state = self.state_dict()
         own_state = self.state_dict()
         for name, param in state_dict.items():
         for name, param in state_dict.items():
             if name in own_state:
             if name in own_state:
-                if not isinstance(param, np.ndarray):
-                    raise ValueError('PyTorch@Dragon can only load params '
-                                     'that saved as numpy array.')
                 state_shape = own_state[name].shape
                 state_shape = own_state[name].shape
                 param_shape = param.shape
                 param_shape = param.shape
                 if state_shape != param_shape:
                 if state_shape != param_shape:
@@ -145,7 +142,14 @@ class Module(object):
                     raise ValueError('DType of state({}) is {}, \n'
                     raise ValueError('DType of state({}) is {}, \n'
                         'While load from a PyArray of {}.'.format(name,
                         'While load from a PyArray of {}.'.format(name,
                         own_state[name].dtype, str(param.dtype)))
                         own_state[name].dtype, str(param.dtype)))
-                dg.workspace.FeedTensor(own_state[name].name, param)
+                if isinstance(param, Tensor):
+                    own_state[name].copy_(param)
+                elif isinstance(param, np.ndarray):
+                    dg.tensor_utils.SetPyArray(own_state[name], param)
+                else:
+                    raise ValueError('Excepted the type of source state is either '
+                        'torch.Tensor or numpy.ndarray, got {}.'.format(type(param)))
+                if verbose:
                     logger.info('* Tensor({}) loaded, Size: ({})'.format(name,
                     logger.info('* Tensor({}) loaded, Size: ({})'.format(name,
                             ', '.join([str(d) for d in param_shape])))
                             ', '.join([str(d) for d in param_shape])))
         if strict:
         if strict:

Dragon/python/dragon/vm/torch/nn/__init__.py

@@ -18,7 +18,7 @@ from dragon.vm.torch.module import Module
 from dragon.vm.torch.tensor import Parameter
 from dragon.vm.torch.tensor import Parameter
 from .modules.conv import Conv2d, ConvTranspose2d
 from .modules.conv import Conv2d, ConvTranspose2d
 from .modules.pooling import MaxPool2d, AvgPool2d
 from .modules.pooling import MaxPool2d, AvgPool2d
-from .modules.activation import ReLU, Sigmoid, Softmax
+from .modules.activation import ReLU, LeakyReLU, Sigmoid, Softmax
 from .modules.linear import Linear
 from .modules.linear import Linear
 from .modules.loss import CrossEntropyLoss
 from .modules.loss import CrossEntropyLoss
 from .modules.container import Container, Sequential, ModuleList
 from .modules.container import Container, Sequential, ModuleList

Dragon/python/dragon/vm/torch/nn/modules/activation.py

@@ -35,6 +35,26 @@ class ReLU(Module):
         return self.run(inputs, outputs)
         return self.run(inputs, outputs)
 
 
 
 
+class LeakyReLU(Module):
+    def __init__(self, negative_slope=0.01, inplace=False):
+        super(LeakyReLU, self).__init__()
+        self._negative_slope = negative_slope
+        self._inplace = inplace
+        self.register_op()
+
+    def register_op(self):
+        self.op_meta = {
+            'op_type': 'Relu',
+            'n_inputs': 1, 'n_outputs': 1,
+            'arguments': {'slope': self._negative_slope}
+        }
+
+    def forward(self, x):
+        inputs = [x]; self.unify_devices(inputs)
+        outputs = [x if self._inplace else self.register_output(x.dtype)]
+        return self.run(inputs, outputs)
+
+
 class Sigmoid(Module):
 class Sigmoid(Module):
     def __init__(self, inplace=False):
     def __init__(self, inplace=False):
         super(Sigmoid, self).__init__()
         super(Sigmoid, self).__init__()

Dragon/python/dragon/vm/torch/ops/__init__.py

@@ -19,7 +19,9 @@ from .arithmetic import (
 )
 )
 
 
 from .ndarray import (
 from .ndarray import (
-    sum, mean, argmin, argmax, max, topk, cat, gather
+    squeeze, unsqueeze,
+    sum, mean, argmin, argmax, max, topk,
+    cat, gather,
 )
 )
 
 
 from .vision import (
 from .vision import (

Dragon/python/dragon/vm/torch/ops/builtin.py

@@ -13,6 +13,8 @@ from __future__ import absolute_import
 from __future__ import division
 from __future__ import division
 from __future__ import print_function
 from __future__ import print_function
 
 
+from dragon.vm.torch.constants import CTX_TO_DEVICE_OPTION
+from dragon.core.tensor_utils import FromTensor
 
 
 from dragon.vm.torch.tensor import Tensor, Size
 from dragon.vm.torch.tensor import Tensor, Size
 from dragon.vm.torch.execute_engine import RunOperator
 from dragon.vm.torch.execute_engine import RunOperator
@@ -20,9 +22,11 @@ from dragon.vm.torch.ops.factory import get_module
 from dragon.vm.torch.autograd.grad_mode import no_grad
 from dragon.vm.torch.autograd.grad_mode import no_grad
 from dragon.vm.torch.ops.primitive import MakeContext
 from dragon.vm.torch.ops.primitive import MakeContext
 from dragon.vm.torch.ops.arithmetic import _fundamental, _rfundamental
 from dragon.vm.torch.ops.arithmetic import _fundamental, _rfundamental
-from dragon.vm.torch.ops.control_flow import _copy
-from dragon.vm.torch.ops.ndarray import \
-    (reshape, _permute, _repeat, _fill, _reduce, _arg_reduce,  _crop)
+from dragon.vm.torch.ops.ndarray import (
+    reshape, squeeze, unsqueeze,
+    _permute, _repeat, _crop,
+    _fill, _reduce, _arg_reduce,
+)
 from dragon.vm.torch.ops.modules.dtype import AsType
 from dragon.vm.torch.ops.modules.dtype import AsType
 
 
 
 
@@ -33,13 +37,15 @@ from dragon.vm.torch.ops.modules.dtype import AsType
 ##############################################
 ##############################################
 
 
 
 
-def copy_(self, src):
+def copy_(self, src, non_blocking=False):
     """Copy the elements from ``src`` into this tensor and return ``self``.
     """Copy the elements from ``src`` into this tensor and return ``self``.
 
 
     Parameters
     Parameters
     ----------
     ----------
     src : vm.torch.Tensor
     src : vm.torch.Tensor
         The source tensor.
         The source tensor.
+    non_blocking : boolean
+        Whether to copy asynchronously between CPU and GPU.
 
 
     Returns
     Returns
     -------
     -------
@@ -47,7 +53,10 @@ def copy_(self, src):
         The ``self`` tensor.
         The ``self`` tensor.
 
 
     """
     """
-    return _copy(self, src)
+    FromTensor(
+        src, CTX_TO_DEVICE_OPTION[tuple(src._ctx)],
+        self.name, CTX_TO_DEVICE_OPTION[tuple(self._ctx)])
+    return self
 
 
 
 
 Tensor.copy_ = copy_
 Tensor.copy_ = copy_
@@ -308,6 +317,75 @@ Tensor.__rtruediv__ = rdiv
 ##############################################
 ##############################################
 
 
 
 
+def _squeeze(self, dim=None):
+    """Returns a tensor with all the dimensions of input of size 1 removed.
+
+    Parameters
+    ----------
+    dim : int
+        The optional dim to remove.
+
+
+    Returns
+    -------
+    vm.torch.Tensor
+        The new tensor.
+
+    """
+    return squeeze(self, dim=dim)
+
+
+def _squeeze_(self, dim=None):
+    """Inplace of ``Tensor.squeeze()``
+
+    Parameters
+    ----------
+    dim : int
+        The optional dim to remove.
+
+    Returns
+    -------
+    vm.torch.Tensor
+        The self.
+
+    """
+    return squeeze(self, dim=dim, out=self)
+
+
+def _unsqueeze(self, dim):
+    """Returns a tensor with a dimension of size 1 inserted at the specified position.
+
+    Parameters
+    ----------
+    dim : int
+        The dim to insert.
+
+    Returns
+    -------
+    vm.torch.Tensor
+        The new tensor.
+
+    """
+    return unsqueeze(self, dim=dim)
+
+
+def _unsqueeze_(self, dim=None):
+    """Inplace of ``Tensor.unsqueeze()``
+
+    Parameters
+    ----------
+    dim : int
+        The optional dim to remove.
+
+    Returns
+    -------
+    vm.torch.Tensor
+        The self.
+
+    """
+    return unsqueeze(self, dim=dim, out=self)
+
+
 def view(self, *args):
 def view(self, *args):
     if self._static_shape:
     if self._static_shape:
         raise RuntimeError('Can not view a leaf variable, it owns the static sizes.')
         raise RuntimeError('Can not view a leaf variable, it owns the static sizes.')
@@ -353,6 +431,10 @@ def min(self, dim=None, keepdim=False):
     return _arg_reduce(self, 'MIN', dim, keepdim)
     return _arg_reduce(self, 'MIN', dim, keepdim)
 
 
 
 
+Tensor.squeeze = _squeeze
+Tensor.squeeze_ = _squeeze_
+Tensor.unsqueeze = _unsqueeze
+Tensor.unsqueeze_ = _unsqueeze_
 Tensor.view = view
 Tensor.view = view
 Tensor.view_as = view_as
 Tensor.view_as = view_as
 Tensor.permute = permute
 Tensor.permute = permute
@@ -412,6 +494,8 @@ Tensor.double = lambda self: _type_to(self, dtype='float64', inplace=False)
 Tensor.double_ = lambda self: _type_to(self, dtype='float64', inplace=True)
 Tensor.double_ = lambda self: _type_to(self, dtype='float64', inplace=True)
 Tensor.byte = lambda self: _type_to(self, dtype='uint8', inplace=False)
 Tensor.byte = lambda self: _type_to(self, dtype='uint8', inplace=False)
 Tensor.byte_ = lambda self: _type_to(self, dtype='uint8', inplace=True)
 Tensor.byte_ = lambda self: _type_to(self, dtype='uint8', inplace=True)
+Tensor.char = lambda self: _type_to(self, dtype='int8', inplace=False)
+Tensor.char_ = lambda self: _type_to(self, dtype='int8', inplace=True)
 Tensor.int = lambda self: _type_to(self, dtype='int32', inplace=False)
 Tensor.int = lambda self: _type_to(self, dtype='int32', inplace=False)
 Tensor.int_ = lambda self: _type_to(self, dtype='int32', inplace=True)
 Tensor.int_ = lambda self: _type_to(self, dtype='int32', inplace=True)
 Tensor.long = lambda self: _type_to(self, dtype='int64', inplace=False)
 Tensor.long = lambda self: _type_to(self, dtype='int64', inplace=False)

Dragon/python/dragon/vm/torch/ops/control_flow.py

@@ -11,12 +11,3 @@
 
 
 from dragon.vm.torch.ops.primitive import MakeContext
 from dragon.vm.torch.ops.primitive import MakeContext
 from dragon.vm.torch.ops.factory import get_module
 from dragon.vm.torch.ops.factory import get_module
-from dragon.vm.torch.ops.modules.control_flow import Copy
-
-
-def _copy(dst, src):
-    if id(dst) == id(src): return dst
-    ctx = MakeContext(inputs=[dst])
-    key = 'torch/ops/copy/{}:{}'.format(ctx[0].lower(), ctx[1])
-    module = get_module(Copy, key, ctx)
-    return module.forward(dst, src)
\ No newline at end of file

Dragon/python/dragon/vm/torch/ops/modules/shape.py

@@ -14,6 +14,7 @@ from __future__ import division
 from __future__ import print_function
 from __future__ import print_function
 
 
 from dragon.vm.torch.ops.modules.base import BaseModule
 from dragon.vm.torch.ops.modules.base import BaseModule
+from dragon.vm.torch.tensor import ReferneceTensor
 
 
 
 
 class Fill(BaseModule):
 class Fill(BaseModule):
@@ -69,13 +70,61 @@ class Reshape(BaseModule):
 
 
     def forward(self, x, shape):
     def forward(self, x, shape):
         inputs = [x]; self.unify_devices(inputs)
         inputs = [x]; self.unify_devices(inputs)
-        outputs = [self.register_output(x.dtype)]
+        outputs = [ReferneceTensor(x)]
         if shape is not None:
         if shape is not None:
             for ix, d in enumerate(shape):
             for ix, d in enumerate(shape):
                 self.set_argument_i(self.shape[ix], d)
                 self.set_argument_i(self.shape[ix], d)
         return self.run(inputs, outputs)
         return self.run(inputs, outputs)
 
 
 
 
+class Squeeze(BaseModule):
+    def __init__(self, key, ctx, **kwargs):
+        super(Squeeze, self).__init__(key, ctx, **kwargs)
+        self.dim = kwargs.get('dim', None)
+        self.register_arguments()
+        self.register_op()
+
+    def register_arguments(self):
+        """No Arguments for squeeze op."""
+        pass
+
+    def register_op(self):
+        self.op_meta = {
+            'op_type': 'Squeeze',
+            'n_inputs': 1, 'n_outputs': 1,
+            'arguments': {'axis': self.dim}
+        }
+
+    def forward(self, x, out=None):
+        inputs = [x]; self.unify_devices(inputs)
+        outputs = [out] if out else [ReferneceTensor(x)]
+        return self.run(inputs, outputs)
+
+
+class UnSqueeze(BaseModule):
+    def __init__(self, key, ctx, **kwargs):
+        super(UnSqueeze, self).__init__(key, ctx, **kwargs)
+        self.dim = kwargs.get('dim', None)
+        self.register_arguments()
+        self.register_op()
+
+    def register_arguments(self):
+        """No Arguments for squeeze op."""
+        pass
+
+    def register_op(self):
+        self.op_meta = {
+            'op_type': 'ExpandDims',
+            'n_inputs': 1, 'n_outputs': 1,
+            'arguments': {'axis': self.dim}
+        }
+
+    def forward(self, x, out=None):
+        inputs = [x]; self.unify_devices(inputs)
+        outputs = [out] if out else [ReferneceTensor(x)]
+        return self.run(inputs, outputs)
+
+
 class Permute(BaseModule):
 class Permute(BaseModule):
     def __init__(self, key, ctx, **kwargs):
     def __init__(self, key, ctx, **kwargs):
         super(Permute, self).__init__(key, ctx, **kwargs)
         super(Permute, self).__init__(key, ctx, **kwargs)

Dragon/python/dragon/vm/torch/ops/ndarray.py

@@ -15,7 +15,8 @@ from __future__ import print_function
 
 
 from dragon.vm.torch.ops.primitive import MakeContext, CanonicalAxis
 from dragon.vm.torch.ops.primitive import MakeContext, CanonicalAxis
 from dragon.vm.torch.ops.factory import get_module
 from dragon.vm.torch.ops.factory import get_module
-from dragon.vm.torch.ops.modules.shape import Reshape, Fill, Permute, Repeat
+from dragon.vm.torch.ops.modules.shape import \
+    Reshape, Squeeze, UnSqueeze, Fill, Permute, Repeat
 from dragon.vm.torch.ops.modules.reduce import Reduce, ArgReduce
 from dragon.vm.torch.ops.modules.reduce import Reduce, ArgReduce
 from dragon.vm.torch.ops.modules.crop import Crop
 from dragon.vm.torch.ops.modules.crop import Crop
 from dragon.vm.torch.ops.modules.axis import Concat, Gather
 from dragon.vm.torch.ops.modules.axis import Concat, Gather
@@ -29,6 +30,22 @@ def reshape(input, shape, shape_like=None):
     return module.forward(input, shape)
     return module.forward(input, shape)
 
 
 
 
+def squeeze(input, dim=None, out=None):
+    ctx = MakeContext(inputs=[input])
+    key = 'torch/ops/squeeze/{}:{}/dim:{}'.format(
+        ctx[0].lower(), ctx[1], dim if dim else 'None')
+    module = get_module(Squeeze, key, ctx, dim=dim)
+    return module.forward(input, out=out)
+
+
+def unsqueeze(input, dim, out=None):
+    ctx = MakeContext(inputs=[input])
+    key = 'torch/ops/unsqueeze/{}:{}/dim:{}'.format(
+        ctx[0].lower(), ctx[1], dim if dim else 'None')
+    module = get_module(UnSqueeze, key, ctx, dim=dim)
+    return module.forward(input, out=out)
+
+
 def _permute(input, perms=None):
 def _permute(input, perms=None):
     ctx = MakeContext(inputs=[input]); len_perms = len(perms) if perms else 0
     ctx = MakeContext(inputs=[input]); len_perms = len(perms) if perms else 0
     key = 'torch/ops/permute/{}:{}/n_dims:#{}'.format(ctx[0].lower(), ctx[1], len_perms)
     key = 'torch/ops/permute/{}:{}/n_dims:#{}'.format(ctx[0].lower(), ctx[1], len_perms)

Dragon/python/dragon/vm/torch/serialization.py

@@ -51,7 +51,8 @@ def _with_file_like(f, mode, body):
             (sys.version_info[0] == 3 and isinstance(f, pathlib.Path)):
             (sys.version_info[0] == 3 and isinstance(f, pathlib.Path)):
         new_fd = True
         new_fd = True
         dir = os.path.dirname(f)
         dir = os.path.dirname(f)
-        if not os.path.exists(dir): os.makedirs(dir)
+        # Bug fix: empty directory, i.e., under the work directory
+        if dir != '' and not os.path.exists(dir): os.makedirs(dir)
         f = open(f, mode)
         f = open(f, mode)
     try:
     try:
         return body(f)
         return body(f)

Dragon/python/dragon/vm/torch/tensor.py

@@ -13,6 +13,8 @@ from __future__ import absolute_import
 from __future__ import division
 from __future__ import division
 from __future__ import print_function
 from __future__ import print_function
 
 
+import sys
+import copy
 import numpy as np
 import numpy as np
 import dragon as dg
 import dragon as dg
 import dragon.core.tensor_utils as tensor_utils
 import dragon.core.tensor_utils as tensor_utils
@@ -23,9 +25,11 @@ from dragon.vm.torch.constants import CTX_TO_DEVICE_OPTION
 from .c_apis import *
 from .c_apis import *
 
 
 
 
-__all__ = ['Tensor', 'Parameter',
+__all__ = [
+    'Tensor', 'Parameter',
     'FloatTensor', 'DoubleTensor',
     'FloatTensor', 'DoubleTensor',
-    'IntTensor', 'LongTensor', 'ByteTensor',
+    'IntTensor', 'LongTensor',
+    'ByteTensor', 'CharTensor',
 ]
 ]
 
 
 
 
@@ -48,6 +52,9 @@ class Tensor(object):
         self._requires_grad = kwargs.get('requires_grad', False)
         self._requires_grad = kwargs.get('requires_grad', False)
         self._dg_tensor = kwargs.get('dg_tensor', None)
         self._dg_tensor = kwargs.get('dg_tensor', None)
         self._own_storage = kwargs.get('own_storage', True)
         self._own_storage = kwargs.get('own_storage', True)
+
+        # Hold it to lock shared objects(i.e., tensor with same storage)
+        self._ref_objects = []
         # Owned by the leaf variables(i.e. Can not be Reshaped)
         # Owned by the leaf variables(i.e. Can not be Reshaped)
         self._static_shape = None
         self._static_shape = None
         # Owned by the grad required variables
         # Owned by the grad required variables
@@ -541,6 +548,71 @@ class Tensor(object):
     #                                            #
     #                                            #
     ##############################################
     ##############################################
 
 
+    def squeeze(self, dim=None):
+        """Returns a tensor with all the dimensions of input of size 1 removed.
+
+        Parameters
+        ----------
+        dim : int
+            The optional dim to remove.
+
+
+        Returns
+        -------
+        vm.torch.Tensor
+            The new tensor.
+
+        """
+        raise NotImplementedError('Refer torch.ops.builtin._squeeze')
+
+    def squeeze_(self, dim=None):
+        """Inplace of ``Tensor.squeeze()``
+
+        Parameters
+        ----------
+        dim : int
+            The optional dim to remove.
+
+        Returns
+        -------
+        vm.torch.Tensor
+            The self.
+
+        """
+        raise NotImplementedError('Refer torch.ops.builtin._squeeze_')
+
+    def unsqueeze(self, dim):
+        """Returns a tensor with a dimension of size 1 inserted at the specified position.
+
+        Parameters
+        ----------
+        dim : int
+            The dim to insert.
+
+        Returns
+        -------
+        vm.torch.Tensor
+            The new tensor.
+
+        """
+        raise NotImplementedError('Refer torch.ops.builtin._unsqueeze')
+
+    def unsqueeze_(self, dim):
+        """Inplace of ``Tensor.unsqueeze()``
+
+        Parameters
+        ----------
+        dim : int
+            The dim to insert.
+
+        Returns
+        -------
+        vm.torch.Tensor
+            The self.
+
+        """
+        raise NotImplementedError('Refer torch.ops.builtin._unsqueeze_')
+
     def view(self, *args):
     def view(self, *args):
         """Return a new tensor with the same data but a different size.
         """Return a new tensor with the same data but a different size.
 
 
@@ -605,13 +677,15 @@ class Tensor(object):
         """
         """
         raise NotImplementedError('Refer torch.ops.builtin.repeat')
         raise NotImplementedError('Refer torch.ops.builtin.repeat')
 
 
-    def copy_(self, src):
+    def copy_(self, src, non_blocking=False):
         """Copy the elements from ``src`` into this tensor and return ``self``.
         """Copy the elements from ``src`` into this tensor and return ``self``.
 
 
         Parameters
         Parameters
         ----------
         ----------
         src : vm.torch.Tensor
         src : vm.torch.Tensor
             The source tensor.
             The source tensor.
+        non_blocking : boolean
+            Whether to copy asynchronously between CPU and GPU.
 
 
         Returns
         Returns
         -------
         -------
@@ -1034,6 +1108,28 @@ class Tensor(object):
         """
         """
         raise NotImplementedError('Refer torch.ops.builtin.byte_')
         raise NotImplementedError('Refer torch.ops.builtin.byte_')
 
 
+    def char(self):
+        """Return a ``int8`` tensor with elements of ``self``.
+
+        Returns
+        -------
+        vm.torch.Tensor
+            The byte tensor.
+
+        """
+        raise NotImplementedError('Refer torch.ops.builtin.char')
+
+    def char_(self):
+        """Inplace of ``Tensor.char()``.
+
+        Returns
+        -------
+        vm.torch.Tensor
+            The byte tensor.
+
+        """
+        raise NotImplementedError('Refer torch.ops.builtin.char_')
+
     ##############################################
     ##############################################
     #                                            #
     #                                            #
     #                  AUTO-GRAD                 #
     #                  AUTO-GRAD                 #
@@ -1126,6 +1222,11 @@ def ByteTensor(*args, **kwargs):
     return Tensor(*args, **kwargs)
     return Tensor(*args, **kwargs)
 
 
 
 
+def CharTensor(*args, **kwargs):
+    kwargs['dtype'] = 'int8'
+    return Tensor(*args, **kwargs)
+
+
 _DTYPE_TO_TENSOR = {
 _DTYPE_TO_TENSOR = {
     'float16': HalfTensor,
     'float16': HalfTensor,
     'float32': FloatTensor,
     'float32': FloatTensor,
@@ -1133,6 +1234,7 @@ _DTYPE_TO_TENSOR = {
     'int32': IntTensor,
     'int32': IntTensor,
     'int64': LongTensor,
     'int64': LongTensor,
     'uint8': ByteTensor,
     'uint8': ByteTensor,
+    'int8': CharTensor,
 }
 }
 
 
 
 
@@ -1158,6 +1260,23 @@ def RuntimeTensor(name, dtype='float32', ctx=None):
     return constructor(dg_tensor=name, ctx=ctx)
     return constructor(dg_tensor=name, ctx=ctx)
 
 
 
 
+def ReferneceTensor(src):
+    """Create a reference from source tensor.
+
+    Commonly used to hold the same storage but takes different sizes,
+    i.e., view, squeeze, and unsqueeze.
+
+    """
+    constructor = _DTYPE_TO_TENSOR[src._dtype]
+    ref = constructor(dg_tensor=src.name, ctx=src._ctx)
+    name = '{}/id:{}'.format(
+        src.name.replace('[TPool]', '[Ref]'), id(ref))
+    dg.workspace.CreateTensor(name)
+    ref._dg_tensor, ref._own_storage = name, False
+    ref._ref_objects.append(src)
+    return ref
+
+
 ##############################################
 ##############################################
 #                                            #
 #                                            #
 #               Tensor-Extension             #
 #               Tensor-Extension             #

Dragon/python/dragon/vm/torch/tensor_uitls.py

@@ -23,7 +23,7 @@ def from_numpy(data):
 
 
     Parameters
     Parameters
     ----------
     ----------
-    data : numpy.ndarray
+    data : ndarray
         The nd-array with various data type.
         The nd-array with various data type.
 
 
     Return
     Return
@@ -113,4 +113,5 @@ __NUMPY_TYPE_TO_TORCH = {
     'int32': 'IntTensor',
     'int32': 'IntTensor',
     'int64': 'LongTensor',
     'int64': 'LongTensor',
     'uint8': 'ByteTensor',
     'uint8': 'ByteTensor',
+    'int8': 'CharTensor',
 }
 }
\ No newline at end of file

Dragon/python/dragon/vm/torch/utils/data/io/data_reader.py

@@ -97,7 +97,7 @@ class DataReader(Process):
         self._db.close()
         self._db.close()
         self._db.open(self._source)
         self._db.open(self._source)
         self._cur_idx = target_idx
         self._cur_idx = target_idx
-        self._db.set(str(self._cur_idx).zfill(self._db_zfill))
+        self._db.set(str(self._cur_idx).zfill(self._zfill))
 
 
     def reset(self):
     def reset(self):
         """Reset the cursor and environment.
         """Reset the cursor and environment.
@@ -112,12 +112,12 @@ class DataReader(Process):
             self._cur_chunk_idx = 0
             self._cur_chunk_idx = 0
             self._start_idx = int(self._part_idx * self._num_shuffle_parts + self._perm[self._cur_chunk_idx])
             self._start_idx = int(self._part_idx * self._num_shuffle_parts + self._perm[self._cur_chunk_idx])
             self._start_idx = int(self._start_idx * self._chunk_size)
             self._start_idx = int(self._start_idx * self._chunk_size)
-            if self._start_idx >= self._db_size: self.next_chunk()
+            if self._start_idx >= self._num_entries: self.next_chunk()
             self._end_idx = self._start_idx + self._chunk_size
             self._end_idx = self._start_idx + self._chunk_size
-            self._end_idx = min(self._db_size, self._end_idx)
+            self._end_idx = min(self._num_entries, self._end_idx)
         else:
         else:
             self._start_idx = 0
             self._start_idx = 0
-            self._end_idx = self._db_size
+            self._end_idx = self._num_entries
 
 
         self.redirect(self._start_idx)
         self.redirect(self._start_idx)
 
 
@@ -145,10 +145,10 @@ class DataReader(Process):
         else:
         else:
             self._start_idx = self._part_idx * self._num_shuffle_parts + self._perm[self._cur_chunk_idx]
             self._start_idx = self._part_idx * self._num_shuffle_parts + self._perm[self._cur_chunk_idx]
             self._start_idx = self._start_idx * self._chunk_size
             self._start_idx = self._start_idx * self._chunk_size
-            if self._start_idx >= self._db_size: self.next_chunk()
+            if self._start_idx >= self._num_entries: self.next_chunk()
             else:
             else:
                 self._end_idx = self._start_idx + self._chunk_size
                 self._end_idx = self._start_idx + self._chunk_size
-                self._end_idx = min(self._db_size, self._end_idx)
+                self._end_idx = min(self._num_entries, self._end_idx)
             self.redirect(self._start_idx)
             self.redirect(self._start_idx)
 
 
     def run(self):
     def run(self):
@@ -165,14 +165,14 @@ class DataReader(Process):
         # init db
         # init db
         self._db = LMDB()
         self._db = LMDB()
         self._db.open(self._source)
         self._db.open(self._source)
-        self._db_size = int(self._db.get('size'))
-        self._db_zfill = int(self._db.get('zfill'))
-        self._epoch_size = int(self._db_size / self._num_parts + 1)
+        self._zfill = self._db.zfill()
+        self._num_entries = self._db.num_entries()
+        self._epoch_size = int(self._num_entries / self._num_parts + 1)
 
 
         if self._use_shuffle:
         if self._use_shuffle:
             if self._chunk_size == 1:
             if self._chunk_size == 1:
                 # each chunk has at most 1 record [For Fully Shuffle]
                 # each chunk has at most 1 record [For Fully Shuffle]
-                self._num_shuffle_parts = int(self._db_size / self._chunk_size / self._num_parts) + 1
+                self._num_shuffle_parts = int(self._num_entries / self._chunk_size / self._num_parts) + 1
             else:
             else:
                 if self._use_shuffle and self._chunk_size == -1:
                 if self._use_shuffle and self._chunk_size == -1:
                     # search a optimal chunk size by chunks [For Chunk Shuffle]
                     # search a optimal chunk size by chunks [For Chunk Shuffle]
@@ -182,12 +182,12 @@ class DataReader(Process):
                     self._chunk_size = min_chunk_size
                     self._chunk_size = min_chunk_size
                     self._num_shuffle_parts = int(math.ceil(self._db._total_size * 1.1 /
                     self._num_shuffle_parts = int(math.ceil(self._db._total_size * 1.1 /
                                                  (self._num_parts * self._chunk_size << 20)))
                                                  (self._num_parts * self._chunk_size << 20)))
-                    self._chunk_size = int(self._db_size / self._num_shuffle_parts / self._num_parts + 1)
+                    self._chunk_size = int(self._num_entries / self._num_shuffle_parts / self._num_parts + 1)
         else:
         else:
             # each chunk has at most K records [For Multiple Nodes]
             # each chunk has at most K records [For Multiple Nodes]
             # note that if ``shuffle`` and ``multiple_nodes`` are all ``False``,
             # note that if ``shuffle`` and ``multiple_nodes`` are all ``False``,
             # ``chunk_size`` and ``num_shuffle_parts`` are meaningless
             # ``chunk_size`` and ``num_shuffle_parts`` are meaningless
-            self._chunk_size = int(self._db_size / self._num_parts) + 1
+            self._chunk_size = int(self._num_entries / self._num_parts) + 1
             self._num_shuffle_parts = 1
             self._num_shuffle_parts = 1
 
 
         self._perm = np.arange(self._num_shuffle_parts)
         self._perm = np.arange(self._num_shuffle_parts)

Dragon/python/setup.py

@@ -42,7 +42,7 @@ find_modules()
 
 
 
 
 setup(name = 'dragon',
 setup(name = 'dragon',
-      version='0.2.2.9',
+      version='0.2.2.10',
       description = 'Dragon: A Computation Graph Virtual Machine Based Deep Learning Framework',
       description = 'Dragon: A Computation Graph Virtual Machine Based Deep Learning Framework',
       url='https://github.com/seetaresearch/Dragon',
       url='https://github.com/seetaresearch/Dragon',
       author='Ting Pan',
       author='Ting Pan',

Dragon/src/contrib/rcnn/bbox_utils.h

@@ -114,7 +114,7 @@ inline void GenerateGridAnchors(
 /******************** Proposal ********************/
 /******************** Proposal ********************/
 
 
 template <typename T, class Context>
 template <typename T, class Context>
-inline void GenerateProposals(
+void GenerateProposals(
     const int                       A,
     const int                       A,
     const int                       feat_h,
     const int                       feat_h,
     const int                       feat_w,
     const int                       feat_w,
@@ -129,7 +129,7 @@ inline void GenerateProposals(
     T*                              proposals);
     T*                              proposals);
 
 
 template <typename T, class Context>
 template <typename T, class Context>
-inline void GenerateProposals_v2(
+void GenerateProposals_v2(
     const int                       total_anchors,
     const int                       total_anchors,
     const float                     im_h,
     const float                     im_h,
     const float                     im_w,
     const float                     im_w,

Dragon/src/contrib/rcnn/proposal_op.cc

@@ -34,7 +34,7 @@ void ProposalOp<Context>::RunWithType() {
             rcnn::GenerateProposals<T, Context>(
             rcnn::GenerateProposals<T, Context>(
                 A, feat_height, feat_width, strides[0],
                 A, feat_height, feat_width, strides[0],
                     im_height, im_width, min_box_h, min_box_w,
                     im_height, im_width, min_box_h, min_box_w,
-                        Input(0).template data<T, Context>() + num_proposals,
+                        Input(0).template data<T, Context>(),
                             Input(1).template data<T, Context>(),
                             Input(1).template data<T, Context>(),
                                 anchors_.template mutable_data<T, Context>(),
                                 anchors_.template mutable_data<T, Context>(),
                                     proposals_.template mutable_data<T, Context>());
                                     proposals_.template mutable_data<T, Context>());
@@ -59,9 +59,9 @@ void ProposalOp<Context>::RunWithType() {
             CHECK_EQ(strides.size(), scales.size())
             CHECK_EQ(strides.size(), scales.size())
                 << "\nGiven " << strides.size() << " strides and "
                 << "\nGiven " << strides.size() << " strides and "
                 << scales.size() << " scales";
                 << scales.size() << " scales";
-            //  cls_probs: [1, 2, total_proposals]
+            //  cls_probs: [1, total_proposals]
             //  bbox_deltas: [1, 4, total_proposals]
             //  bbox_deltas: [1, 4, total_proposals]
-            TIndex total_proposals = Input(-3).dim(2), acc_proposals = 0;
+            TIndex total_proposals = Input(-3).dim(1), acc_proposals = 0;
             const TIndex pre_nms_topn = std::min(total_proposals, pre_nms_top_n);;
             const TIndex pre_nms_topn = std::min(total_proposals, pre_nms_top_n);;
             proposals_.Reshape({ total_proposals, 5 });
             proposals_.Reshape({ total_proposals, 5 });
             auto* proposals = proposals_.template mutable_data<T, CPUContext>();
             auto* proposals = proposals_.template mutable_data<T, CPUContext>();
@@ -93,7 +93,7 @@ void ProposalOp<Context>::RunWithType() {
 
 
             rcnn::GenerateProposals_v2<T, Context>(total_proposals,
             rcnn::GenerateProposals_v2<T, Context>(total_proposals,
                 im_height, im_width, min_box_h, min_box_w,
                 im_height, im_width, min_box_h, min_box_w,
-                    Input(-3).template data<T, Context>() + total_proposals,
+                    Input(-3).template data<T, Context>(),
                         Input(-2).template data<T, Context>(),
                         Input(-2).template data<T, Context>(),
                             proposals_.template mutable_data<T, Context>());
                             proposals_.template mutable_data<T, Context>());
 
 
@@ -113,7 +113,7 @@ void ProposalOp<Context>::RunWithType() {
         }
         }
         total_rois += num_rois;
         total_rois += num_rois;
         Ydata += (num_rois * 5);
         Ydata += (num_rois * 5);
-        im_info += 3;
+        im_info += Input(-1).dim(1);
     }
     }
     Output(0)->Reshape(vector<TIndex>({ total_rois, 5 }));
     Output(0)->Reshape(vector<TIndex>({ total_rois, 5 }));
 
 
@@ -148,9 +148,9 @@ void ProposalOp<Context>::RunWithType() {
 template <class Context>
 template <class Context>
 void ProposalOp<Context>::RunOnDevice() {
 void ProposalOp<Context>::RunOnDevice() {
     num_images = Input(0).dim(0);
     num_images = Input(0).dim(0);
-    CHECK_EQ(Input(-1).count(), num_images * 3)
-        << "\nExcepted " << num_images * 3 << " groups image info, "
-        << "but got " << Input(-1).count() / 3 << ".";
+    CHECK_EQ(Input(-1).dim(0), num_images)
+        << "\nExcepted " << num_images << " groups image info, "
+        << "but got " << Input(-1).dim(0) << ".";
     roi_indices_.Reshape({ post_nms_top_n });
     roi_indices_.Reshape({ post_nms_top_n });
     Output(0)->Reshape({ num_images * post_nms_top_n, 5 });
     Output(0)->Reshape({ num_images * post_nms_top_n, 5 });
 
 

Dragon/src/core/graph.cc

@@ -231,17 +231,24 @@ GraphDef Graph::Share(const GraphDef& optimized_graph) {
 
 
     GraphDef g; g.CopyFrom(optimized_graph);
     GraphDef g; g.CopyFrom(optimized_graph);
 
 
+    //  actually we need a white list
+    Set<string> whitelist;
+    for (auto& target : optimized_graph.target())
+        whitelist.insert(target);
+
     //  rename to create in-place
     //  rename to create in-place
     for (int i = 0; i < optimized_graph.op_size(); i++) {
     for (int i = 0; i < optimized_graph.op_size(); i++) {
         const OperatorDef& op = optimized_graph.op(i);
         const OperatorDef& op = optimized_graph.op(i);
         for (int j = 0; j < op.input_size(); j++) {
         for (int j = 0; j < op.input_size(); j++) {
-            if (renamed_.count(op.input(j)) &&
+            if (whitelist.count(op.input(j)) == 0 &&
+                renamed_.count(op.input(j)) &&
                 ws()->SetProxy(op.input(j), renamed_[op.input(j)]))
                 ws()->SetProxy(op.input(j), renamed_[op.input(j)]))
                     *g.mutable_op(i)->mutable_input(j)
                     *g.mutable_op(i)->mutable_input(j)
                         = renamed_[op.input(j)];
                         = renamed_[op.input(j)];
         }
         }
         for (int j = 0; j < op.output_size(); j++) {
         for (int j = 0; j < op.output_size(); j++) {
-            if (renamed_.count(op.output(j)) &&
+            if (whitelist.count(op.output(j)) == 0 &&
+                renamed_.count(op.output(j)) &&
                 ws()->SetProxy(op.output(j), renamed_[op.output(j)]))
                 ws()->SetProxy(op.output(j), renamed_[op.output(j)]))
                     *g.mutable_op(i)->mutable_output(j)
                     *g.mutable_op(i)->mutable_output(j)
                         = renamed_[op.output(j)];
                         = renamed_[op.output(j)];

Dragon/src/operators/loss/sigmoid_cross_entropy_op.cc

@@ -17,7 +17,7 @@ void SigmoidCrossEntropyOp<Context>::RunWithType() {
 
 
     if (normalization == "UNIT") {
     if (normalization == "UNIT") {
         Output(0)->ReshapeLike(losses);
         Output(0)->ReshapeLike(losses);
-        Output(0)->template Copy<Context, Context>(losses);
+        Output(0)->template CopyFrom<Context>(losses);
         return;
         return;
     }
     }
 
 

Dragon/src/operators/loss/sigmoid_focal_loss_op.cc

@@ -19,7 +19,7 @@ void SigmoidFocalLossOp<Context>::RunWithType() {
 
 
     if (normalization == "UNIT") {
     if (normalization == "UNIT") {
         Output(0)->ReshapeLike(losses);
         Output(0)->ReshapeLike(losses);
-        Output(0)->template Copy<Context, Context>(losses);
+        Output(0)->template CopyFrom<Context>(losses);
         return;
         return;
     }
     }
 
 

Dragon/src/operators/loss/softmax_focal_loss_op.cc

@@ -24,7 +24,7 @@ void SoftmaxFocalLossOp<Context>::RunWithType() {
 
 
     if (normalization == "UNIT") {
     if (normalization == "UNIT") {
         Output(0)->ReshapeLike(losses);
         Output(0)->ReshapeLike(losses);
-        Output(0)->template Copy<Context, Context>(losses);
+        Output(0)->template CopyFrom<Context>(losses);
         return;
         return;
     }
     }
 
 

Dragon/src/operators/loss/sparse_softmax_cross_entropy_op.cc

@@ -59,7 +59,7 @@ void SparseSoftmaxCrossEntropyOp<Context>::RunWithType() {
 
 
     if (normalization == "UNIT") {
     if (normalization == "UNIT") {
         Output(0)->ReshapeLike(losses);
         Output(0)->ReshapeLike(losses);
-        Output(0)->template Copy<Context, Context>(losses);
+        Output(0)->template CopyFrom<Context>(losses);
         return;
         return;
     }
     }
 
 
@@ -167,7 +167,7 @@ void SparseSoftmaxCrossEntropyGradientOp<Context>::RunOnDevice() {
             auto* dXdataF32 = Output(0)->template data<float, Context>();
             auto* dXdataF32 = Output(0)->template data<float, Context>();
             auto* dXdataF16 = prob->template mutable_data<float16, Context>();
             auto* dXdataF16 = prob->template mutable_data<float16, Context>();
             kernel::TypeA2B<float, float16, Context>(Output(0)->count(), dXdataF32, dXdataF16);
             kernel::TypeA2B<float, float16, Context>(Output(0)->count(), dXdataF32, dXdataF16);
-            Output(0)->template Copy<Context, Context>(*prob);
+            Output(0)->template CopyFrom<Context>(*prob);
         }
         }
     } else LOG(FATAL) << DTypeHelper(Input(0), { "float32", "float16" });
     } else LOG(FATAL) << DTypeHelper(Input(0), { "float32", "float16" });
 }
 }

Dragon/src/operators/misc/gradient_op.cc

@@ -68,7 +68,7 @@ template <class Context>
 void StopGradientOp<Context>::RunOnDevice() {
 void StopGradientOp<Context>::RunOnDevice() {
     if (Output(0)->name() != Input(0).name()) {
     if (Output(0)->name() != Input(0).name()) {
         Output(0)->ReshapeLike(Input(0));
         Output(0)->ReshapeLike(Input(0));
-        Output(0)->template Copy<Context, Context>(Input(0));
+        Output(0)->template CopyFrom<Context>(Input(0));
     }
     }
 }
 }
 
 

Dragon/src/operators/mpi/mpi_broadcast_op.cc

@@ -14,7 +14,7 @@ void MPIBroadcastOp<Context>::RunWithType() {
         auto* Xdata = Input(0).template mutable_data<T, CPUContext>();
         auto* Xdata = Input(0).template mutable_data<T, CPUContext>();
 #endif
 #endif
         MPI_Bcast(Xdata, Input(0).count(), mpi_dtype(), comm_root, comm);
         MPI_Bcast(Xdata, Input(0).count(), mpi_dtype(), comm_root, comm);
-        Output(0)->template Copy<Context, Context>(Input(0));
+        Output(0)->template CopyFrom<Context>(Input(0));
     } else { 
     } else { 
 #ifdef WITH_MPI_CUDA
 #ifdef WITH_MPI_CUDA
         auto* Ydata = Output(0)->template mutable_data<T, Context>();
         auto* Ydata = Output(0)->template mutable_data<T, Context>();

Dragon/src/operators/mpi/mpi_gather_op.cc

@@ -8,7 +8,7 @@ namespace dragon {
 template <class Context> template <typename T>
 template <class Context> template <typename T>
 void MPIGatherOp<Context>::RunWithType() {
 void MPIGatherOp<Context>::RunWithType() {
     if (comm_rank == comm_root) {
     if (comm_rank == comm_root) {
-        Output(comm_rank)->template Copy<Context, Context>(Input(0));
+        Output(comm_rank)->template CopyFrom<Context>(Input(0));
         for (int i = 0; i < comm_size; i++) {
         for (int i = 0; i < comm_size; i++) {
             if (i == comm_root) continue;
             if (i == comm_root) continue;
 #ifdef WITH_MPI_CUDA
 #ifdef WITH_MPI_CUDA
@@ -76,7 +76,7 @@ OPERATOR_SCHEMA(MPIGather).NumInputs(1).NumOutputs(1, INT_MAX);
 template <class Context> template <typename T>
 template <class Context> template <typename T>
 void MPIGatherGradientOp<Context>::RunWithType() {
 void MPIGatherGradientOp<Context>::RunWithType() {
     if (comm_rank == comm_root) {
     if (comm_rank == comm_root) {
-        Output(0)->template Copy<Context, Context>(Input(this->comm_rank + 1));
+        Output(0)->template CopyFrom<Context>(Input(this->comm_rank + 1));
         for (int i = 0; i < comm_size; i++) {
         for (int i = 0; i < comm_size; i++) {
             if (i == comm_root) continue;
             if (i == comm_root) continue;
 #ifdef WITH_MPI_CUDA
 #ifdef WITH_MPI_CUDA

Dragon/src/operators/ndarray/crop_op.cc

@@ -125,7 +125,7 @@ void CropOp<Context>::RunOnDevice() {
     //  do nothing
     //  do nothing
     if (process_axes.size() == 0) {
     if (process_axes.size() == 0) {
         Output(0)->ReshapeLike(Input(0));
         Output(0)->ReshapeLike(Input(0));
-        Output(0)->template Copy<Context, Context>(Input(0));
+        Output(0)->template CopyFrom<Context>(Input(0));
         //  squeeze dimensions
         //  squeeze dimensions
         vector<TIndex> squeeze_shape;
         vector<TIndex> squeeze_shape;
         for (int i = 0; i < keep_dims.size(); i++)
         for (int i = 0; i < keep_dims.size(); i++)
@@ -229,7 +229,7 @@ void CropGradientOp<Context>::RunOnDevice() {
     //  do nothing 
     //  do nothing 
     if (process_axes.size() == 0) {
     if (process_axes.size() == 0) {
         Output(0)->ReshapeLike(Input(-1));
         Output(0)->ReshapeLike(Input(-1));
-        Output(0)->template Copy<Context, Context>(Input(-1));
+        Output(0)->template CopyFrom<Context>(Input(-1));
         return;
         return;
     }
     }
 
 

Dragon/src/operators/ndarray/expand_dims_op.cc

 #include "core/workspace.h"
 #include "core/workspace.h"
-#include "operators/ndarray/expand_dims_op.h"
+#include "operators/ndarray/dimension_op.h"
 
 
 namespace dragon {
 namespace dragon {
 
 
 template <class Context>
 template <class Context>
 void ExpandDimsOp<Context>::RunOnDevice() {
 void ExpandDimsOp<Context>::RunOnDevice() {
+    TIndex _axis_ = axis >= 0 ? axis :
+        axis + (TIndex)Input(0).ndim() + 1;
     vector<TIndex> dims = Input(0).dims();
     vector<TIndex> dims = Input(0).dims();
-    if (axis == -1 || axis >= (int)dims.size()) dims.push_back(1);
-    else dims.insert(dims.begin() + axis, 1);
-    //  save Xshape
-    Tensor* sv = ws()->CreateTensor(
-        "/mnt/" + anchor() + "/expand_dims/x_shape");
-    sv->Reshape({ (TIndex)Input(0).ndim() });
-    auto* Sdata = sv->template mutable_data<TIndex, CPUContext>();
-    for (int i = 0; i < Input(0).ndim(); i++) Sdata[i] = Input(0).dim(i);
+    if (_axis_ < 0 ||
+            _axis_ >= (TIndex)dims.size())
+                dims.push_back(1);
+    else dims.insert(dims.begin() + _axis_, 1);
     Output(0)->Reshape(dims);
     Output(0)->Reshape(dims);
-    if (Output(0)->name() != Input(0).name())
-        Output(0)->template Copy<Context, Context>(Input(0));
+    Output(0)->SetMeta(Input(0).meta());
+    Output(0)->Share(Input(0).memory());
 }
 }
 
 
 DEPLOY_CPU(ExpandDims);
 DEPLOY_CPU(ExpandDims);
 #ifdef WITH_CUDA
 #ifdef WITH_CUDA
 DEPLOY_CUDA(ExpandDims);
 DEPLOY_CUDA(ExpandDims);
 #endif
 #endif
-OPERATOR_SCHEMA(ExpandDims)
-    .NumInputs(1).NumOutputs(1)
-    .Inplace({ { 0, 0 } });
+OPERATOR_SCHEMA(ExpandDims).NumInputs(1).NumOutputs(1);
 
 
-template <class Context>
-void ExpandDimsGradientOp<Context>::RunOnDevice() {
-    Tensor* sv = ws()->GetTensor(
-        "/mnt/" + anchor() + "/expand_dims/x_shape");
-    auto* Sdata = sv->template mutable_data<TIndex, CPUContext>();
-    vector<TIndex> x_shape(sv->count());
-    for (int i = 0; i < sv->count(); i++) x_shape[i] = Sdata[i]; 
-    Output(0)->Reshape(x_shape);
-    if (Output(0)->name() != Input(-1).name())
-        Output(0)->template Copy<Context, Context>(Input(-1));
-}
 
 
 DEPLOY_CPU(ExpandDimsGradient);
 DEPLOY_CPU(ExpandDimsGradient);
 #ifdef WITH_CUDA
 #ifdef WITH_CUDA
 DEPLOY_CUDA(ExpandDimsGradient);
 DEPLOY_CUDA(ExpandDimsGradient);
 #endif
 #endif
 OPERATOR_SCHEMA(ExpandDimsGradient)
 OPERATOR_SCHEMA(ExpandDimsGradient)
-    .NumInputs(1).NumOutputs(1)
-    .Inplace({ { 0, 0 } });
+    .NumInputs(2).NumOutputs(1).Inplace({ { 1, 0 } });
 
 
 class GetExpandDimsGradient final : public GradientMakerBase {
 class GetExpandDimsGradient final : public GradientMakerBase {
  public:
  public:
     GRADIENT_MAKER_CTOR(GetExpandDimsGradient);
     GRADIENT_MAKER_CTOR(GetExpandDimsGradient);
     vector<OperatorDef> MakeDefs() override {
     vector<OperatorDef> MakeDefs() override {
         return SingleDef(def.type() + "Gradient", "",
         return SingleDef(def.type() + "Gradient", "",
-            vector<string> {GO(0)},
+            vector<string> {I(0), GO(0)},
             vector<string> {GI(0)});
             vector<string> {GI(0)});
     }
     }
 };
 };

Dragon/src/operators/ndarray/flatten_op.cc

 #include "core/workspace.h"
 #include "core/workspace.h"
-#include "operators/ndarray/flatten_op.h"
+#include "operators/ndarray/dimension_op.h"
 
 
 namespace dragon {
 namespace dragon {
 
 
 template <class Context>
 template <class Context>
-void FlattenOp<Context>::SqueezeRun() {
+void FlattenOp<Context>::RunOnDevice() {
     vector<TIndex> output_dims;
     vector<TIndex> output_dims;
+    if (keep_axes != INT_MAX) {
+        CHECK_LE(keep_axes, (int)Input(0).ndim())
+            << "\nThe total number of axes is " + Input(0).ndim()
+            << ", can not keep " + keep_axes << " .";
+        int i = 0;
+        for (; i < keep_axes - 1; i++)
+            output_dims.push_back(Input(0).dim(i));
+        if (Input(0).count(i) != 1)
+            output_dims.push_back(Input(0).count(i));
+    } else {
         for (int i = 0; i < axis; i++)
         for (int i = 0; i < axis; i++)
             output_dims.push_back(Input(0).dim(i));
             output_dims.push_back(Input(0).dim(i));
         if (num_axes < 1) {
         if (num_axes < 1) {
@@ -16,76 +26,32 @@ void FlattenOp<Context>::SqueezeRun() {
             for (int i = axis + num_axes; i < Input(0).ndim(); i++)
             for (int i = axis + num_axes; i < Input(0).ndim(); i++)
                 output_dims.push_back(Input(0).dim(i));
                 output_dims.push_back(Input(0).dim(i));
         }
         }
+    }
     Output(0)->Reshape(output_dims);
     Output(0)->Reshape(output_dims);
-    if (Output(0)->name() != Input(0).name())
-        Output(0)->template Copy<Context, Context>(Input(0));
-}
-
-template <class Context>
-void FlattenOp<Context>::KeepRun() {
-    CHECK_LE(keep_axes, (int)Input(0).ndim())
-        << "\nThe total number of axes is " + Input(0).ndim()
-        << ", can not keep " + keep_axes << " .";
-    vector<TIndex> output_dims;
-    int i = 0;
-    for (; i < keep_axes - 1; i++)
-        output_dims.push_back(Input(0).dim(i));
-
-    if (Input(0).count(i) != 1)
-        output_dims.push_back(Input(0).count(i));
-
-    if (Output(0)->name() != Input(0).name())
-        Output(0)->template Copy<Context, Context>(Input(0));
-}
-
-template <class Context>
-void FlattenOp<Context>::RunOnDevice() {
-    //  save Xshape
-    Tensor* sv = ws()->CreateTensor(
-        "/mnt/" + anchor() + "/flatten/x_shape");
-    sv->Reshape({ (TIndex)Input(0).ndim() });
-    auto* Sdata = sv->template mutable_data<TIndex, CPUContext>();
-    for (int i = 0; i < Input(0).ndim(); i++) 
-        Sdata[i] = Input(0).dim(i);
-    if (keep_axes != INT_MAX) KeepRun();
-    else SqueezeRun();
+    Output(0)->SetMeta(Input(0).meta());
+    Output(0)->Share(Input(0).memory());
 }
 }
 
 
 DEPLOY_CPU(Flatten);
 DEPLOY_CPU(Flatten);
 #ifdef WITH_CUDA
 #ifdef WITH_CUDA
 DEPLOY_CUDA(Flatten);
 DEPLOY_CUDA(Flatten);
 #endif
 #endif
-OPERATOR_SCHEMA(Flatten)
-    .NumInputs(1).NumOutputs(1)
-    .Inplace({ { 0, 0 } });
-
+OPERATOR_SCHEMA(Flatten).NumInputs(1).NumOutputs(1);
 
 
-template <class Context>
-void FlattenGradientOp<Context>::RunOnDevice() {
-    Tensor* sv = ws()->GetTensor(
-        "/mnt/" + anchor() + "/flatten/x_shape");
-    auto* Sdata = sv->template mutable_data<TIndex, CPUContext>();
-    vector<TIndex> x_shape(sv->count());
-    for (int i = 0; i < sv->count(); i++) x_shape[i] = Sdata[i];
-    Output(0)->Reshape(x_shape);
-    if (Output(0)->name() != Input(-1).name())
-        Output(0)->template Copy<Context, Context>(Input(-1));
-}
 
 
 DEPLOY_CPU(FlattenGradient);
 DEPLOY_CPU(FlattenGradient);
 #ifdef WITH_CUDA
 #ifdef WITH_CUDA
 DEPLOY_CUDA(FlattenGradient);
 DEPLOY_CUDA(FlattenGradient);
 #endif
 #endif
 OPERATOR_SCHEMA(FlattenGradient)
 OPERATOR_SCHEMA(FlattenGradient)
-    .NumInputs(1).NumOutputs(1)
-    .Inplace({ { 0, 0 } });
+    .NumInputs(2).NumOutputs(1).Inplace({ { 1, 0 } });
 
 
 class GetFlattenGradient final : public GradientMakerBase {
 class GetFlattenGradient final : public GradientMakerBase {
  public:
  public:
     GRADIENT_MAKER_CTOR(GetFlattenGradient);
     GRADIENT_MAKER_CTOR(GetFlattenGradient);
     vector<OperatorDef> MakeDefs() override {
     vector<OperatorDef> MakeDefs() override {
         return SingleDef(def.type() + "Gradient", "",
         return SingleDef(def.type() + "Gradient", "",
-            vector<string> {GO(0)},
+            vector<string> {I(0), GO(0)},
             vector<string> {GI(0)});
             vector<string> {GI(0)});
     }
     }
 };
 };

Dragon/src/operators/ndarray/pad_op.cc

@@ -61,7 +61,7 @@ void PadOp<Context>::RunOnDevice() {
     //  do nothing
     //  do nothing
     if (process_axes.size() == 0) {
     if (process_axes.size() == 0) {
         Output(0)->ReshapeLike(Input(0));
         Output(0)->ReshapeLike(Input(0));
-        Output(0)->template Copy<Context, Context>(Input(0));
+        Output(0)->template CopyFrom<Context>(Input(0));
         return;
         return;
     }
     }
 
 
@@ -175,7 +175,7 @@ void PadGradientOp<Context>::RunOnDevice() {
     //  do nothing 
     //  do nothing 
     if (process_axes.size() == 0) {
     if (process_axes.size() == 0) {
         Output(0)->ReshapeLike(Input(-1));
         Output(0)->ReshapeLike(Input(-1));
-        Output(0)->template Copy<Context, Context>(Input(-1));
+        Output(0)->template CopyFrom<Context>(Input(-1));
         return;
         return;
     }
     }
 
 

Dragon/src/operators/ndarray/random_pick_op.cc

@@ -39,7 +39,7 @@ void RandomPickOp<Context>::RunOnDevice() {
 
 
     if (Output(1)->name() != "ignore") {
     if (Output(1)->name() != "ignore") {
         Output(1)->ReshapeLike(*pick_indices);
         Output(1)->ReshapeLike(*pick_indices);
-        Output(1)->template Copy<Context, Context>(*pick_indices);
+        Output(1)->template CopyFrom<Context>(*pick_indices);
     }
     }
 }
 }
 
 

Dragon/src/operators/ndarray/reshape_op.cc

 #include "core/workspace.h"
 #include "core/workspace.h"
-#include "operators/ndarray/reshape_op.h"
+#include "operators/ndarray/dimension_op.h"
 
 
 namespace dragon {
 namespace dragon {
 
 
@@ -67,50 +67,31 @@ void ReshapeOp<Context>::RunOnDevice() {
         << "\nCan not change the total size."
         << "\nCan not change the total size."
         << Input(0).DimString()
         << Input(0).DimString()
         << " -> " << DimString(new_shape);
         << " -> " << DimString(new_shape);
-    //  save Xshape
-    Tensor* sv = ws()->CreateTensor(
-        "/mnt/" + anchor() + "/reshape/x_shape");
-    sv->Reshape({ (TIndex)Input(0).ndim() });
-    auto* Sdata = sv->template mutable_data<TIndex, CPUContext>();
-    for (int i = 0; i < Input(0).ndim(); i++) Sdata[i] = Input(0).dim(i);
     Output(0)->Reshape(new_shape);
     Output(0)->Reshape(new_shape);
-    if (Output(0)->name() != Input(0).name())
-        Output(0)->template Copy<Context, Context>(Input(0));
+    Output(0)->SetMeta(Input(0).meta());
+    Output(0)->Share(Input(0).memory());
 }
 }
 
 
 DEPLOY_CPU(Reshape);
 DEPLOY_CPU(Reshape);
 #ifdef WITH_CUDA
 #ifdef WITH_CUDA
 DEPLOY_CUDA(Reshape);
 DEPLOY_CUDA(Reshape);
 #endif
 #endif
-OPERATOR_SCHEMA(Reshape)
-    .NumInputs(1).NumOutputs(1)
-    .Inplace({ { 0, 0 } });
+OPERATOR_SCHEMA(Reshape).NumInputs(1).NumOutputs(1);
 
 
 
 
-template <class Context>
-void ReshapeGradientOp<Context>::RunOnDevice() {
-    Tensor* sv = ws()->GetTensor(
-        "/mnt/" + anchor() + "/reshape/x_shape");
-    auto* Sdata = sv->template mutable_data<TIndex, CPUContext>();
-    vector<TIndex> x_shape(sv->count());
-    for (int i = 0; i < sv->count(); i++) x_shape[i] = Sdata[i];
-    Output(0)->Reshape(x_shape);
-    if (Output(0)->name() != Input(-1).name())
-        Output(0)->template Copy<Context, Context>(Input(-1));
-}
-
 DEPLOY_CPU(ReshapeGradient);
 DEPLOY_CPU(ReshapeGradient);
 #ifdef WITH_CUDA
 #ifdef WITH_CUDA
 DEPLOY_CUDA(ReshapeGradient);
 DEPLOY_CUDA(ReshapeGradient);
 #endif
 #endif
-OPERATOR_SCHEMA(ReshapeGradient).NumInputs(1).NumOutputs(1).Inplace({ { 0, 0 } });
+OPERATOR_SCHEMA(ReshapeGradient)
+    .NumInputs(2).NumOutputs(1).Inplace({ { 1, 0 } });
 
 
 class GetReshapeGradient final : public GradientMakerBase {
 class GetReshapeGradient final : public GradientMakerBase {
  public:
  public:
     GRADIENT_MAKER_CTOR(GetReshapeGradient);
     GRADIENT_MAKER_CTOR(GetReshapeGradient);
     vector<OperatorDef> MakeDefs() override {
     vector<OperatorDef> MakeDefs() override {
         return SingleDef(def.type() + "Gradient", "",
         return SingleDef(def.type() + "Gradient", "",
-            vector<string> {GO(0)},
+            vector<string> {I(0), GO(0)},
             vector<string> {GI(0)});
             vector<string> {GI(0)});
     }
     }
 };
 };

Dragon/src/operators/ndarray/squeeze_op.cc

+#include "core/workspace.h"
+#include "operators/ndarray/dimension_op.h"
+
+namespace dragon {
+
+template <class Context>
+void SqueezeOp<Context>::RunOnDevice() {
+    TIndex _axis_ = axis >= 0 ? axis :
+        axis + (TIndex)Input(0).ndim();
+    vector<TIndex> dims;
+    for (int i = 0; i < Input(0).ndim(); i++)
+        if ((Input(0).dim(i) != 1) ||
+                (_axis_ != INT_MAX &&
+                    Input(0).dim(i) == 1 &&
+                        i != _axis_))
+                            dims.push_back(Input(0).dim(i));
+    Output(0)->Reshape(dims);
+    Output(0)->SetMeta(Input(0).meta());
+    Output(0)->Share(Input(0).memory());
+}
+
+DEPLOY_CPU(Squeeze);
+#ifdef WITH_CUDA
+DEPLOY_CUDA(Squeeze);
+#endif
+OPERATOR_SCHEMA(Squeeze).NumInputs(1).NumOutputs(1);
+
+
+DEPLOY_CPU(SqueezeGradient);
+#ifdef WITH_CUDA
+DEPLOY_CUDA(SqueezeGradient);
+#endif
+OPERATOR_SCHEMA(SqueezeGradient)
+    .NumInputs(2).NumOutputs(1).Inplace({ { 1, 0 } });
+
+class GetSqueezeGradient final : public GradientMakerBase {
+ public:
+    GRADIENT_MAKER_CTOR(GetSqueezeGradient);
+    vector<OperatorDef> MakeDefs() override {
+        return SingleDef(def.type() + "Gradient", "",
+            vector<string> {I(0), GO(0)},
+            vector<string> {GI(0)});
+    }
+};
+REGISTER_GRADIENT(Squeeze, GetSqueezeGradient);
+
+}    // namespace dragon
\ No newline at end of file

Dragon/src/operators/ndarray/tile_op.cc

@@ -35,7 +35,7 @@ void TileOp<Context>::RunOnDevice() {
     //  do nothing 
     //  do nothing 
     if (process_axes.size() == 0) {
     if (process_axes.size() == 0) {
         Output(0)->ReshapeLike(Input(0));
         Output(0)->ReshapeLike(Input(0));
-        Output(0)->template Copy<Context, Context>(Input(0));
+        Output(0)->template CopyFrom<Context>(Input(0));
         return;
         return;
     }
     }
 
 
@@ -96,7 +96,7 @@ void TileGradientOp<Context>::RunOnDevice() {
     //  do nothing 
     //  do nothing 
     if (process_axes.size() == 0) {
     if (process_axes.size() == 0) {
         Output(0)->ReshapeLike(Input(-1));
         Output(0)->ReshapeLike(Input(-1));
-        Output(0)->template Copy<Context, Context>(Input(-1));
+        Output(0)->template CopyFrom<Context>(Input(-1));
         return;
         return;
     }
     }
 
 

Dragon/src/operators/vision/lrn_op.cc

@@ -17,11 +17,11 @@ template <class Context> template <typename T>
 void LRNOp<Context>::SplitRunWithType() {
 void LRNOp<Context>::SplitRunWithType() {
     sqr_in = ws()->CreateTensor("/mnt/" + anchor() + "/sqr/in");
     sqr_in = ws()->CreateTensor("/mnt/" + anchor() + "/sqr/in");
     sqr_in->ReshapeLike(Input(0));
     sqr_in->ReshapeLike(Input(0));
-    sqr_in->template Copy<Context, Context>(Input(0));
+    sqr_in->template CopyFrom<Context>(Input(0));
 
 
     prod_in = ws()->CreateTensor("/mnt/" + anchor() + "/prod/in");
     prod_in = ws()->CreateTensor("/mnt/" + anchor() + "/prod/in");
     prod_in->ReshapeLike(Input(0));
     prod_in->ReshapeLike(Input(0));
-    prod_in->template Copy<Context, Context>(Input(0));
+    prod_in->template CopyFrom<Context>(Input(0));
 }
 }
 
 
 template <class Context> template <typename T>
 template <class Context> template <typename T>

Dragon/src/protos/caffemodel.proto

 syntax = "proto2";
 syntax = "proto2";
 
 
+package dragon;
+
 message BlobShape {
 message BlobShape {
   repeated int64 dim = 1 [packed = true];
   repeated int64 dim = 1 [packed = true];
 }
 }

Dragon/src/protos/dragon.proto

 syntax = "proto2";
 syntax = "proto2";
 
 
+package dragon;
+
 message TensorProto {
 message TensorProto {
   repeated int32 dims = 1;
   repeated int32 dims = 1;
   enum DataType {
   enum DataType {