“59e5cc51d63c71c6c9eab0e715fdbdad4e6e5314”上不存在“python/paddle/fluid/tests/custom_op/test_sysconfig.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