* show the attr and functions of the Layer,test=develop
* add buffer for dir,test=develop
* fix __dir__,test=develop
* fix doc of Layer.__dir__, test=develop
* support tuple/list init for VarBase,test=develop
* fix doc of fluid.dygraph.to_variable,test=develop
* fix doc of fluid.dygraph.to_variable,test=develop
* fix the compatibility of PY2 and PY3 in paddle.distributed.launch
test=develop
* only pull log of local rank 0
test=develop
* log exception if UnicodeEncodeError occurs when pulling log in
paddle.distributed.launch
test=develop
Co-authored-by: SunGaofeng <peakbee@gmail.com>
* Add `matrix_nms_op`
test=develop
* Make ci happy
test=develop
* Exit early when no detection
test=develop
* Fix license year
test=develop
* Output index as well
test=develop
* Match nms2 lod behavior and add `return_index` flag
test=develop
* Make CI happy
test=develop
* Fix wording
test=develop
* add new API: MultiStepDecay, a new learing rate strategy, test=develop
* add new API: MultiStepDecay, a new learing rate strategy,test=develop
* add new API: MultiStepDecay, a new learing rate strategy,test=develop
* add base class of LearningRateEpochDecay, and MultiStepDecay, and StepDecay, test=develop
* fix doc to add coverage,test=develop
* add new api: optimizer.set_lr, test=develop
* add API doc and example code for optimizer.set_lr,test=develop
* add API doc and example code for optimizer.set_lr,test=develop
* Modified doc to :api_attr: imperative,test=develop
Support Various-Length Return Grammar in Dy2stat. This PR is a follow-up of https://github.com/PaddlePaddle/Paddle/pull/25176 .
The basic idea is putting no-value placeholder variables at `return` statement to make all `return` statement have same length, after that the static graph can have fixed fetch output (code at return_transformer.py). Then remove those no-value placeholder when we finally return dygraph result (code at partial_program.py).
However, various length return in Bert model is still not supported. The dy2stat can change the code as I wish but some ops which check shape at compile time (e.g. Reshape, MatMul) will throw error because of the no-value-placeholder may not have the required shape. Is this a matter? To me, those no-value placeholder will be replaced as really values meeting shape requirements at run time, so I think the solution should be some way to do the compile-time checking. By the way, every time when we have dynamic shape, it often causes problem in dy2stat. We should find a way to handle it in the future.
Fixing various return in Bert is my TODO thing and I will also find some other existing models for verification.
This PR added basic support for 'return' grammar in dy2stat. It supports the control flow of 'return'.
The basics idea is using a return value variable to store the early return statements and boolean state variables with if-else to skip the statements after the return statements.
**This PR is very basic support. There are some corner cases I didn't develop/test**. For example, 'return None', 'return different length of variables', 'return non-tensor and tensor together', 'no return statement'. **These corner cases will be done in my next PRs**. Target date is this week.
**Note**:
1. for the unit test, I changed test_program_translator.py because the StaticCode of `dyfunc_with_if_else` will change. To guarantee the correctness of `dyfunc_with_if_else`, I also run it in `TestRecursiveReturn` in test_return.py.
2. I commented the early return code in bert_dygraph_model.py because 'return different length of variables' is unsupported now. I also know that there are some other models used early return and we didn't enable it in the unit test. I will add support for it in next PRs and then re-enable those tests.
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