[New-bugs-announce] [issue39957] bpo39775 not fixed - inspect.Signature.parameters still dict/mappingproxy

[Jens Reidel]

New submission from Jens Reidel <jens.reidel at gmail.com>:

Hi guys,

compiling CPython from the master branch will result in a git history with the commit https://github.com/python/cpython/commit/211055176157545ce98e6c02b09d624719e6dd30 included and in Lib/inspect.py, however the return type is still like before and behaviour has not changed.

    Python 3.9.0a4+ (heads/master:be79373a78, Mar 11 2020, 16:36:27) 
    [GCC 9.2.1 20190827 (Red Hat 9.2.1-1)] on linux
    Type "help", "copyright", "credits" or "license" for more information.
    >>> import inspect
    >>> inspect.signature(lambda x, y: None).parameters == inspect.signature(lambda y, x: None).parameters
    True
    >>> 

I have been able to confirm this on all builds I've done. To get it to do expected behaviour and return False on above code, I need to patch back the commit that changed OrderedDict to dict (https://raw.githubusercontent.com/Gelbpunkt/python-image/master/inspect.patch is the file I am using to patch). I have compiled against the codebase of https://github.com/python/cpython/commit/be79373a78c0d75fc715ab64253c9b757987a848 and believe this is some issue with the Lib/inspect.py code internally if the patch file can fix it.

----------
components: Library (Lib)
messages: 364118
nosy: gelbpunkt
priority: normal
severity: normal
status: open
title: bpo39775 not fixed - inspect.Signature.parameters still dict/mappingproxy
type: behavior
versions: Python 3.9

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue39957>
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