“6deb33d9dcd3db9203b98de0f6fb0d0e83cc2176”上不存在“paddle/legacy/gserver/gradientmachines/NeuralNetwork.cpp”
* 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