* [CodeStyle][E711] use `is`/`is not` for comparison with `None`

* `self.assertTrue($A is None)` -> `self.assertIsNone($A)`

* `self.assertTrue($A is not None)` -> `self.assertIsNotNone($A)`

* `self.assertFalse($A is None)` -> `self.assertIsNotNone($A)`

* `self.assertEqual($A, None)` -> `self.assertIsNone($A)`

* `self.assertNotEqual($A, None)` -> `self.assertIsNotNone($A)`

* [CodeStyle][E712] use `if cond`/`if cond is True` for comparison with `True`

* revert changes in fluid

* revert unrelated file

* revert changes in norm

* revert changes in auto_parallel_amp

* fix norm and auto_parallel_amp

* revert a typo fix due to fixed at #47477

* [Auto Parallel] Improve the c++ dist attr

* [Auto Parallel] Modify test_program.py

* Support custom stream for standalone executor
Co-authored-by: NYulong Ao <aoyulong@baidu.com>

* Einsum Support Complex

* code fix

* add unittest for complex grad with einsum

* set rtol=1e-4

* fix

* [CodeStyle][py2] remove `six` package (part2)

* six.ensure_str

* remove unused `import six`

* remove six from BUILTIN_LIKELY_MODULES

* remove six in example code

* remove some decode

* try to fix example code

* fix MockEtcdClient get/get_prefix returns data type

* fix MockEtcdClient get_prefix returns data

* fix MockEtcdClient get returns data

* remove `six` in pypi and conda requirements

* fix MockEtcdClient add_watch_callback/add_watch_prefix_callback returns data type

* refine MockEtcdClient

* add unittest for einsum-v2-trace and diagonal

* repeat labels.

* einsum support repeated labels.

* forward is ok for diagonal and undiagonalized.
TODO: check backward is ok by our theorem.

* backward is ok!

* fix by PR suggestions.

* fix ci error

* fix ci error

* fix ci warning

* feat: add int8 support for vit

* test:add test

* [Auto Parallel] Improve the c++ dist attr

* [Auto Parallel] Modify test_program.py

* [Auto Parallel] Add the missiong import

* fix python module not found bug

* delete unused cast,test=allcases

* maping from dist name scope to single name scope

* update

* fix gen cmake

* support runtype is '' when using test_runner.py

* Revert "fix gen cmake"

This reverts commit d7a653d33aeacb8bb4a13957c9961ed9f626a18f.

* update gen-ut-cmakelist; test=document_fix

* revert code; test=document_fix

* fix engine build method

* fix import

* update engine cost

* update raise error

* update cmakelist

* revert optimizer

* revert optimizer

* fix unittest

* fix unittest
Co-authored-by: Ncaozhou <caozhou@radi.ac.cn>

* prelnlayernorm_shift

* add ut

* remove paddle_enforce

* remove useless

* add UT

* remove UT

* add UT

* set timeout

* fc/matmuls + scale fuse pass

* remove double-extension

* add unit tests

* comments from review

* codestyle

* add pass to int8 list

* new codestyle

* attr name typo

* Fix paddle.pow() bugs

* Add unittest cases

* Fix ut cases

* Add ut cases on multiple devices

* fix slice_assign_p jvp and transpose

* modify code style

* modify test_jvp_and_transpose for slice_assign_p

* modify code style

* add unit test

* add test for rsample

* add assert in test_backpropagation

* fix bug

* [CodeStyle][py2] remove `paddle.compat`

* remove compat from `paddle.__init__`

* enable_static in sample code

* Revert "enable_static in sample code"

This reverts commit ffccaa633900154ea5f3d056e746aae9a1927399.

* enable_static in sample code

* fix bugs while cond receives dict as input

* add unittest

* change flatten -> _is_sequence_except_dict

* [CodeStyle][black] format dy2static unittests

* format some missing files

* update lineno in test_origin_info

* update lineno in test_error

* update lineno

* update config

* re-blacken python code

* temporarily disable date and diff_py_file

* skip a format

* adjust timeout of test_trt_activation_pass

* test=infer-coverage

* Fix W605 in tools folder by adding escape symbols

* Fix W605 in incubate and some other folders

* Fix W605 in /fluid/test folders

* Update tools/analysisPyXml.py
Co-authored-by: NNyakku Shigure <sigure.qaq@gmail.com>

* Add some changes to manual and auto escape symbols

* revert changes in transformer.py

* Fix new code with W605 error: add escape symbols

* revert changes in transformer.py

* revert changes in transformer.py
Co-authored-by: NNyakku Shigure <sigure.qaq@gmail.com>

* add test for stage2 + dp

* update test for stage2 + dp.

* update.

* update.

* rename op in yaml

* fix test_layout_autotune

* fix layout autotune of transpose

* Add TypeHint Transformer

* add unittest for typehint transformer