* 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

* [Auto Parallel] Add links for the reference codes.

* Update recorder.py

* Update trial.py

* Update test=document_fix

* Update test=document_fix

* [Auto Parallel] Redesign the tunner for Auto Parallel