Merge pull request #500 from tingggggg/develop

fix the AveragePool

x2paddle/op_mapper/dygraph/onnx2paddle/opset9/opset.py

@@ -1194,7 +1194,7 @@ class OpSet9():
         }
         self.paddle_graph.add_layer(
             paddle_op, 
-            inputs={'x': val_x.name}, 
+            inputs={'x': val_x if isinstance(val_x, str) else val_x.name}, 
             outputs=layer_outputs, 
             **layer_attrs)