“bc01d56e6a56ca4b24ec78e57f7def72611bc7a7”上不存在“test/dygraph_to_static/test_save_inference_model.py”
* use yapf to format all python file * yapf exclude two unittests file for they rely on writing and reading file, and format will break them * disable diff_py_file because too many diff files cause command following failed