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Re: [Python] pypy3 integration

From: Ludovic Courtès
Subject: Re: [Python] pypy3 integration
Date: Mon, 27 Jul 2020 12:48:31 +0200
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/26.3 (gnu/linux)


Lars-Dominik Braun <> skribis:

>> pypy3 works somewhat well for me already in this regard:
> indeed, you’re right.
> This will probably break for some packages, because python provides
> Python 3.8 whereas pypy3 provides Python 3.6.  (They’ve always lagged
> behind and given that we’re going towards 3.10, well…) One example are
> packages depending on importlib.resources, which only became available
> with Python 3.7. Unfortunately this includes the widely-used pytest (or
> rather: its dependency python-pluggy).
> Also Python’s C ABI is not stable[1] and thus extensions compiled for 3.8
> can fail in unpredictable ways with 3.6. And looking at python-numpy,
> it seems they won’t even load.

Also, what about .pyc files?  Does pypy create compatible .pyc files?

> So, does this justify creating pypy3-* packages?

It probably does.  But do we want to mirror all the ‘python-’ packages,
or just some of them?  It seems overkill to mirror all of them.

Perhaps we could have a package transformation option to turn a
‘python-build-system’ package into a pypy package?

Ludo’, who knows little about Python.

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