* refine to_string

* re-enable ut

* remove image_resize series api in Paddle2.0

* update assign/cast/linspace/addcmul op doc for 2.0 api,test=document_fix

* fix bug about cast doc for 2.0 api,test=document_fix

* Add api of constant in paddle.nn.initializer

* Add api of constant in paddle.nn.initializer

* Add api of constant in paddle.nn.initializer

* Add api of constant in paddle.nn.initializer

* Add api of constant in paddle.nn.initializer

* Add api of constant in paddle.nn.initializer

* Add api of constant in paddle.nn.initializer

* Add api of KaimingUniform & KaimingNormal in paddle.nn.initializer

* Add api of KaimingUniform & KaimingNormal in paddle.nn.initializer

* Add api of KaimingUniform & KaimingNormal in paddle.nn.initializer

* Add api of KaimingUniform & KaimingNormal in paddle.nn.initializer

* Add api of KaimingUniform & KaimingNormal in paddle.nn.initializer

* Add api of KaimingUniform & KaimingNormal in paddle.nn.initializer

* test=document_fix

* test=document_fix

* add sparse tensor load method

update the code for the topk message optimize 

* polish some error message

* add white list

* revert shell script change

add paddle.nn.initializer API, including: Normal, TruncatedNormal, Uniform, XavierNormal, XavierUniform, Assign (#27769)

* test=develop, bug fix for parameter_recv
* test=develop, for unittest, test_fleet_rolemaker_new

*test=kunlun

* add multitask

* add multitask, test=develop

* fix code style, test=develop

* add partail push dense, test=develop

* fix has_kay in py3, test=develop

* fix, test=develop

* fix, test=develop

* fix, test=develop

* fix norm api doc, test=develop

* fix error message, test=develop

* fix api norm, test=develop

* add adagrad, test=develop

* fix bug, test=develop

* fix bug, test=develop

* add spetral_norm, test=develop

* fix adagrad, test=develop

* merge , test=develop

* add lookup_table_v2_op_xpu, test=kunlun

* add lookup_table_v2_op_xpu, test=kunlun

* change some Tips ,test=kunlun

* fix gpu version paddle Error when have no CUDA device

* optimize format and add new unittest

* fix coverage problem

* fix unittest format

* change static mode to dygraph mode

* use subprocess in unittest

Made a change in python API to support the GPU version of unique OP working in static graph (#27899)

* Made a change to support unique op working in static graph

* Correct python format error

* use exhaustive_search for float16

* tune algo only when dtype is float16

* update, test=develop

Add api of KaimingUniform & KaimingNormal in paddle.nn.initializer

As the title

As the title

* add dropout,log_loss, test=kunlun
* fix dropout, test=kunlun
* polish error message, test=kunlun
* change boost::get to BOOST_GET_CONST, test=kunlun
* fix copyright, test=kunlun

* support mean,softmax_with_cross_entropy on Baidu Kunlun,test=kunlun

* fix unittests error,test=kunlun

* delete boost::get,test=kunlun

* add xpu sgd & momentum

test=document_fix

* Fix en doc for rnn.py. test=document_fix

* add sumary feature

* refine printting tensor

* add sci_mode

* add sample code

* fix indent error

* fix _format_item

* polish code

* support item indent

* add ut

* set place for ut

* fix py2 issue

* fix ut

* add conv for xpu, test=kunlun

* polish error_message, test=kunlun

* polish error_message, test=kunlun

* fix copyrigth, test=kunlun