* rename fluid to base

* fix setup and rename paddle.fluid

* fix protobuf generated paddle.fluid

* fix some errors

* fix cmake depends

* fix some error

* try to fix cache error

* fix codestyle && some doc error

* remove build change

* fix some error

---------
Co-authored-by: NXiangGao <jeff41404@gmail.com>

* add paddle-symbolic-trace to paddle

* add symoblic trace

* delete swp

* support Layer in symbolic trace

* fix test-symbolic-trace, make symbolic trace return a StaticFunction

* template the error message

* fix some unittest

* Modify the execution mode of test

* Modify the module name

* add dy2static unittest decorator

* change some unittest files by @ast_only_test

* fix unittest.

* test-symbolic-trace

* update test_write_python_container.py

* update

* fix test_param_parse.py

* add submodule and ln -sf in cmakefile

* update

* update

* fix some ast only errors

* update

* Polish ut

* fix unittests

* update

* update

* fix unittests

* update

* test warning ast only

* update

* Ast only some uts

* Fix unitests

* test_error ast only

* update

* update

* Support build_strategy for sot

* update

* import sot as a third party module

* update

* update

* Polish code

* update

* update

* update

* update

* update

* remove old fluid api and use paddle.nn.relu instead

* fix

* comment the print of ast code

* add try-finally block

* fix dy2static stop-gradient bugs

* fix code

* remove unused submodule and minor codestyle fix

* fix

* fix cast error

* fix interpolate meets int64 in static model

* add evalframe support for py311

* fix

* fix err

* switch ENABLE_FALL_BACK=False

* fix

* Fix CI for some unittest

* add ENABLE_SOT

* remove setup.py dependences

---------
Co-authored-by: NNotHaozi <zhangmenghao@baidu.com>
Co-authored-by: Nfeifei-111 <2364819892@qq.com>
Co-authored-by: N0x45f <wangzhen45@baidu.com>
Co-authored-by: NSigureMo <sigure.qaq@gmail.com>

* remove no used fluid beam_search_decoder

* move Layer and related helper to paddle.nn.common

* modify Layer references from dygraph.layers.Layer to paddle.nn.common.layers

* stash changge

* remove fluid layer_object_helper, layers.py

* remove fluid layers init

* add setip

* fix unitest

* delete layers in fluid.dygraph

* merge paddle.tensor.stat,py

* fix circle import

* fix curcle import

* remove redundant in_dygraph_mode import

* revoce paddle.nn.common.* in fluid.__init__

* recovery nn.rnn

* paddle.frame use lazy import import paddle.jit to avoid circle import

* remove left dygraph.layers ref

* merge develop

* fix import error

* fix test error

* fxi merge error

* fix test fluid.Layer

* fix test error

* fix test error

* fix import error

* fix import error

* fix comments

* fix circle import

* fix rnn import error

* fix circle import

* migrate fill_constant to paddle.tensor

* move fill_constant to paddle.tensor and repalce the reference

* add missing fill_constant replacement

* fix typro

* remove unused import fill_constant

* fix zeros import error

* fix circle import

* fix layers.zeros

* fix unitest

* fix unitests

* fix unitest

* use paddle.full replace fill_constant in samplecode

* fix sample code

* recovery xpu test

* recovery xpu test

* fix circle import

* fix utils import error

* fix utils error

* fix circle import

* redo

* fix circle import

* fix prim fill constant import

* fix type error

* fix increase error

* fix test error

* fix fill_constant

* rebase merge

* code fix

* fix bugs

* add enable_to_static and drop some methods of ProgramTranslator

* fix code style

* fix cant import enable_to_static and update unitest

* change unitest and rollback code of PT

* fix can't import as of utils

* roll back PT

* fix roll back

* add some unitest

* add unitest and fix codestyle bug in api.py

* finish all unitest

* remove ProgramTranslator

* fix code style

* restore test_program_translator

* api.py remove get_func

* TestDygraphToStaticCode

* fix check_type and import err

* roll back PT without getcode

* roll back pt with get_code

* convert_to_static

* fix import __all__

* 移除 declarative 接口

* 修改 CI报错，清理注释

* Merge branch 'reduce_sum' of https://github.com/GhostScreaming/Paddle into mine_fluid_clean_common.

* Fix some bugs.

* Clean APIs in python/paddle/fluid/layers/control_flow.py

* Polish code style.

* Change API.

* Fix some bugs.

* Fix some bugs.

* move softmax to paddle2.0

* fix some bugs

* resolve conflict

* remove some code

* modify code style

* fix bugs

* fix code

* fix move code

* fix some bugs

* fix code

* fix some code

* modify the header file

* fix bugs

* fix some examples

* fix mish example

* fix code

* [Fluid Clean]Migrate utils files and delete dygraph_to_static dir

* fix setup.py.in

* fix import

* fix unittest

* fix code style

* fix unittest

* [Fluid Clean] Migrate program_translate.py/jit.py into paddle.jit dir

* [CodeStyle][py2][U008] remove unnecessary args in `super()`

* remove remained args

* revert changes in test_pylayer_op

* Revert "revert changes in test_pylayer_op"

This reverts commit ff185a9ae738afac3b0264f61bde6c6b7f72e7c4.

* revert some changes in example code

* update config

* re-blacken python code

* temporarily disable date and diff_py_file

* skip a format

* [CodeStyle] remove all future import

* revert test_error.py

* restore future import in example code

[CodeStyle][NPU] use np.testing.assert_allclose instead of self.assertTrue(np.allclose(...)) (part 1) (#44988)

* autofix

* try resolve precision issues

* revert some changes

* clean some `err_msg`

* 0.0001 -> 1e-4

* update commented assert code

* try to fix some shape errors

* `numpy` -> `np`

* empty commit, trigger kunlun ci, test=kunlun

* empty commit, retrigger kunlun ci, test=kunlun

* empty commit, trigger kunlun ci, try fix npu memcpy_h2d, test=kunlun

* try fix npu import error, test=kunlun

* add support for control flow block analysis

* move FunctionNameLivenessAnalysis into utils

* pass test_ifelse.py

* remove duplicate data_layer_not_check

* pass the test_ifelse.py

* fix unittest error .

* fix all ci error in first version

* temporay disable CreateVariableTransformer

* fix ci errors

* fix function name liveness analysis bugs

* modifty def cond

* fix

* fix ci error - v2

* fix by code review

* change return_name_ids -> return_name

* change fluid.mean to paddle.mean

* reverse some old code examples

* 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

* Fix cond_block_grad error when handle no need grad vras

* Add comment and UT

* Switch some dy2st UT to eager mode

* Add UT

* Refine eager run_program OP for dy2st UT

* append run_program error string and refine run_program_grad

* remove some comments

* refine ConstructXGradTensors

* fix error when set buffer in forward

* add unittest

* refine class name

* refine not framework.in_dygraph_mode() in if

* fix UT error

* add comment

* refine code

* remove useless import

* allow ifelse return `int` in paddle cond

* add test and refine code

* polish code, add test

* code format

* fix undefind var in For

* fix code style

The PR description is long. See details in the PR link.

* Support return variable in only one of if body or else. 

* remove after_visit in IfElseTransformer.

* Modify the result of get_name_ids in test_ifelse_basic.py 

* Add unittest to test the new case. 

* Modify code according to reviews. 

* fix bug with `if Tensor` in is_control_flow test=develop

* remove continue test=develop

* support to train in static

* support to independent decorator

* remove in_dygraph_mode condition in ProgramTranslator

* fix import param_guard and add train/eval test=develop

* Modify into ShareVarsFromScope and rm __all__ in partial_program test=develop

* Refine mechanism of calling outer function test=develop

* fix typo test=develop