[API Compatible] Use a more robust signature parsing method for Python API sinking to C++

[DanielSun11]

PR Category

Operator Mechanism

PR Types

Improvements

Description

对#74676 的完善。
采用 #74676 (comment) @SigureMo 建议的方法，提升C++下沉方案中解析signature 过程的鲁棒性。

pcard-67164

[SigureMo]

LGTMeow

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[SigureMo]

**************************************************************
API Difference is: 
- paddle._paddle_docs.add_doc_and_signature (ArgSpec(args=['method', 'docstr', 'signature'], varargs=None, varkw=None, defaults=None, kwonlyargs=[], kwonlydefaults=None, annotations={'return': None, 'method': <class 'str'>, 'docstr': <class 'str'>, 'signature': <class 'str'>}), ('document', '10436ac8f85701d92d9e96d33530a256'))
?                                                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^                                                                                                                 ----                                            ^^^^^^^^^

+ paddle._paddle_docs.add_doc_and_signature (ArgSpec(args=['func_name', 'docstr', 'func_def'], varargs=None, varkw=None, defaults=None, kwonlyargs=[], kwonlydefaults=None, annotations={'return': None, 'func_name': <class 'str'>, 'docstr': <class 'str'>, 'func_def': <class 'str'>}), ('document', '10436ac8f85701d92d9e96d33530a256'))
?                                                           +++++++  ^^^^^^^^^^^^^^^^^^^^^^                                                                                                               +++++++  

这个 API 是不是误暴露为公开 API 了，会呈现在官网文档的，这个看起来是内部 API，应该可以从 __all__ 里删掉¹

Footnotes

1. __all__ 里的 API 会作为公开 API 呈现，比如 paddle.a.b.c.__all__ = ["d", "e"] 会将 paddle.a.b.c.d 和 paddle.a.b.c.e 作为公开 API，这是 Paddle 的规范，不是 Python 的规范 ↩

[codecov-commenter]

Codecov Report

❌ Patch coverage is 93.33333% with 1 line in your changes missing coverage. Please review.
⚠️ Please upload report for BASE (develop@14373b3). Learn more about missing BASE report.

Files with missing lines	Patch %	Lines
python/paddle/_paddle_docs.py	93.33%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             develop   #74700   +/-   ##
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  Coverage           ?   93.33%           
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  Files              ?        1           
  Lines              ?       15           
  Branches           ?        0           
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  Hits               ?       14           
  Misses             ?        1           
  Partials           ?        0           

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