Hartmut Goebel <h.goebel@crazy-compilers.com> writes:

> Am 06.11.2017 um 09:52 schrieb Ludovic Courtès:
>>> [15:37:41] <mb[m]1> At this stage we might as well wait for this to land
>>> upstream: https://www.python.org/dev/peps/pep-0552/
>>>
>>> So, it seems, that we are waiting for this pep to land upstream.
>> Cool, thanks for the notification.
>
> Seems like my message did not go through:
>
> This change will not solve out problem!
>
> PEP 552 proposes a new file-format for .pyc file and a hash-based
> mechanism for checking if the .pyc file is recent. This means, you can
> not backport this changes to Python 3.6 or older. Even if you manage to
> backport, this would seriously break all tools working on .pyc files.

We only support Python 2 and the latest (in Guix, anyway!) Python 3
interpreter.  So while we will indeed need a solution for Python2, we
don't have to care about older 3.x variants.