fix converter try except bug

src/converter.py

@@ -401,6 +401,7 @@ def test():
     logging.info(load_graph(sym))
 
 def load_checkpoint(params, network_struct):
+   try:
       symbol = mx.sym.load(network_struct)
       save_dict = mx.nd.load(params)
       arg_params = {}
@@ -412,6 +413,9 @@ def load_checkpoint(params, network_struct):
         if tp == 'aux':
             aux_params[name] = v
       return (symbol, arg_params, aux_params)
+   except Exception, e:
+      logging.info('model load failed!!!')
+      return (None, None, None)
 
 #function created by xuboxuan@20170807
 #if __name__ == '__main__':
@@ -420,12 +424,14 @@ def Run_Converter(model_param,model_json,seetanet_model):
     #parser.add_argument('--model_param',type=str,default = None)    
     #parser.add_argument('--model_json',type=str,default = None)    
     #args = parser.parse_args()
-   #model_param = "wKgB6Fmo2w2ASRqpBky2APcM8zs.params"
-   #model_json  = "wKgB6Vmo2w2AXrJbAAGjO2NrZLE75.json"
+   #model_param = "wKgB7Vm2iBaALVPdENbR4G1D6sc.params"
+   #model_json  = "wKgB6lm2iBaAcq2PAAANvOLMPRI82.json"
    #seetanet_model = "model_test"
    try:
       sym, arg_params, aux_params = \
         load_checkpoint(model_param, model_json)
+      if sym is None or arg_params is None or aux_params is None:
+           return None
       graph = load_graph(model_json)
       converter = Converter(graph, arg_params, aux_params)
       logging.info('start to convert model parameters')