* [CodeStyle][F811] fix some unittests

* fix setup.py

* remove ignore from flake8 config

* remove repeat TestAbsDoubleGradCheck

* fix rrelu test

* fix fft ut

* add noqa in fluid.lstm ut

* add rtol and atol in test_matmul_v2_op

* update rtol

* empty commit

* empty commit

* revert changes in matmul ut and add noqa

* rename test case name

* [CodeStyle][F821] fix remained F821 issues

* refine comment

* fix _set_item

* [CodeStyle][E262][E265] make comments start with `# `

* flake8 config

* [CodeStyle][E711][E712] update flake8 config

* empty commit, test=document_fix

* [CodeStyle][E231] update flake8 config

* empty commit, test=document_fix

* update .flake8 config: remove F522, test=document_fix

* test=document_fix

* [CodeStyle][black] update flake8 config

* empty commit, test=document_fix

* Update .flake8 config: remove W605, test=document_fix

* Resolve conflict, test=document_fix

* [CodeStyle][F403] remove error code E403 in flake8 config

* empty commit, test=document_fix

[CodeStyle][F401] update flake8 F401 config (python_paddle/inference,device,profiler,text,metric,incubate,quantization,libs,audio,amp,jit). (#46763)

Signed-off-by: Yulv-git <yulvchi@qq.com>
Signed-off-by: Yulv-git <yulvchi@qq.com>

* exclude python code that auto-generated by protoc

* [CodeStyle][F401] update flake8 F401 config (unittests/npu,xpu,mlu,ipu)

* add npu, mlu to `exclude` field

* empty commit, test=document_fix

* [CodeStyle][E306] remove error code E306 in flake8 config

* empty commit, test=document_fix

* Remove F522,F524,F541 in .flake8 config

* empty commit, test=document_fix

* empty commit, test=document_fix

* Update README.md

* Update README.md

* Update .flake8 config: remove F601 code, text=document_fix

* Update README.md

* Update README.md

* Remove F402 code in config

[CodeStyle][F401] update flake8 F401 config (python_paddle/proto,onnx,optimizer,hapi,autograd,framework,io,cost_model,geometric,vision,static). test=document_fix (#46756)