* update config

* re-blacken python code

* temporarily disable date and diff_py_file

* skip a format

* init gumbel api

* commit: update test file

* fix：bug

* update Gumbel API

* upgrade distribution/gumbel.py

* add tests/test_distribution_gumbel.py

* fix：code style

* fix：code style

* fix：code style

* fix：code style

* fix bug

* fix：code style

* fix：code style

* fix：rollback uniform

* fix：delete invalid code

* fix：bug and add static test

* fix：code style

* fix：code style

* fix：delete init transforms

* fix：bug

* fix：bug

* fix：code style

* fix：code style

* fix：add transforms

* fix：code style

* fix：code style

* fix：bug

* fix：bug

* fix：code style

* fix：code style

* fix：bug

* fix：code style

* fix：code style

* fix：bug for gumbel.py / add：judge transforms'len for transformed_distribution.py

* update gumbel.py

* fix：bug for test_distribution_gumbel.py

* fix：bug for test_distribution_gumbel_static.py

* fix：code style

* fix：code style

* fix：coverage

* fix：bug

* fix：bug

* fix：code style

* fix：bug

* delete：no use package for gumbel.py

* add：coverage transforms'len judge for test_distribution_gumbel.py

* fix：code style for test_distribution_gumbel.py

* fix：coverage

* fix：code style

* fix：code style

* fix：code style

* fix：code style

* fix：code style

* fix：en doc

* fix：param

* fix：copyright

* fixSample; test=document_fix
Co-authored-by: Ndasen <sen15530876201@163.com>

[CodeStyle][F401] remove unused imports in python_paddle/nn_tensor_reader_tests_distributed_distribution_dataset_utils. (#46721)

* fix some error

* fix

* fix some error

* fix bugs

* fix some errors

* fix

* Update transform.py

fix some docs errors

* Update normal.py

fix some doc errors

* Update uniform.py

fix some docs errors

* Update kl.py

fix some docs errors

* Update math.py

fix some docs error

* Update math.py

fix heaviside links

* Update loss.py

fix

* Update transform.py

fix bugs

* Update math.py

fix

* fix some format issue

* Update normal.py

* fix missing np

* order imports

* fix some flake8 warning

* Update python/paddle/tensor/math.py

* fix OP-->API

* fix op

* fix grid_sample format

* trim trailing whitespace

* empty commit, test=document_fix

* empty commit
Co-authored-by: NSigureMo <sigure.qaq@gmail.com>
Co-authored-by: NLigoml <39876205+Ligoml@users.noreply.github.com>

* [Eager] Cast,uniform_random,assign_value use final state

* fix mistake

* fix mistake

* fix CI errors

* add dygraph test for unform

* add fp16 test case for bilinear_initializer

* 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

* add random varaiable transformations API for paddle's distribution package

* add TransformedDistribution API for paddle's probability distribution package

* add random variable transformation unitests for static graph

* replace math.prod which not support python3.7 with functools.reduce

* add Independent and TransformedDistribution distribution

* add unittests for constraint

* fix typo and AffineTransform sample code error

* add mean,variance,rsample abstract method for Distribution

* refactor eager flags

* fix flags error when we switch from eager to dygraph

* fix ci problem

* fix ci

* fix ci

* merge develop and fix code style

* merge develop and fix code style

* fix op test error

* fix op test error

* fix op test error

* fix op test error

* fix op test error

* merge develop

move distribution.py into distribution package and split into different file for better scalability (#38047)