Merge pull request #667 from yeliang2258/fix_box_coder_dev

fix box_coder

Author: yeliang2258

paddle2onnx/op_mapper/detection/box_coder.py

@@ -354,7 +354,7 @@ def opset_7(cls, graph, node, **kw):
         for input_name, output_name in zip(outputs_output_point1,
                                            ouputs_points_unsqueeze):
             tmp_node = mapper_helper.unsqueeze_helper(
-                graph, input_name, [len(output_shape_step1)], [output_name])
+                graph, input_name, [len(output_shape_step1)], output_name)
         outputs_points_unsqueeze_list = [
             output[0] for output in ouputs_points_unsqueeze
         ]

paddle2onnx/op_mapper/mapper_helper.py

@@ -45,8 +45,9 @@ def unsqueeze_helper(graph, input, axes, outputs=None):
     inputs.append(input[0])
     if not isinstance(axes, list):
         axes = [axes]
-    if outputs is not None and not isinstance(outputs, list):
+    if outputs is not None and isinstance(outputs, six.string_types):
         outputs = [outputs]
+
     if graph.opset_version < 13:
         unsqueeze_node = graph.make_node(
             "Unsqueeze", inputs=inputs, outputs=outputs, axes=axes)