[Python-Dev] signature for PySide ready (original) (raw)

Christian Tismer tismer at stackless.com
Sat Aug 19 04:38:37 EDT 2017

Hi Nick,

On 19.08.17 09:37, Nick Coghlan wrote:

On 19 August 2017 at 02:55, Jelle Zijlstra <jelle.zijlstra at gmail.com> wrote:

2017-08-18 18:20 GMT+02:00 Yury Selivanov <yselivanov.ml at gmail.com>:

There's a backport of signature API to Python 2. Although last time I checked it was fairly outdated.

I wrote a backport earlier this year: https://pypi.python.org/pypi/inspect2. Nice. Yury was probably referring to https://funcsigs.readthedocs.io/, which is a partial backport specifically of inspect.Signature and friends. Either way, the answer to Christian's original question is that "Yes, supporting signature is also useful in Python 2.x", as even though the native inspect module doesn't support it, 3rd party backports do.

I did not use a backport, but simply hacked it together, myself:

The hairy part was my way to create the PySide PyCFunction objects in a compatible way like Python 3 does it: the handling of PyCFunction's "self" parameter is different (holds type info, Python 2 does not). That needed much more internal knowledge as intended...

Well, I thought the existence of signature might be a good reason to switch to Python 3, but if I support Python 2, the advantage is gone. But if it's ok with you, then I'll publish both versions.

Thanks a lot for the feedback.

Ciao - Chris

-- Christian Tismer :^) tismer at stackless.com Software Consulting : http://www.stackless.com/ Karl-Liebknecht-Str. 121 : https://github.com/PySide 14482 Potsdam : GPG key -> 0xFB7BEE0E phone +49 173 24 18 776 fax +49 (30) 700143-0023

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