[Debian-science-sagemath] sagemath and Python 3

[Tobias Hansen]

On 9/6/19 1:30 PM, Dima Pasechnik wrote:
> On Fri, Sep 6, 2019 at 12:23 PM Tobias Hansen <thansen at debian.org> wrote:
>> On 9/4/19 8:55 PM, Julien Puydt wrote:
>>> Hi,
>>>
>>> Le 04/09/2019 à 18:25, Tobias Hansen a écrit :
>>>
>>>> It seems that the only dependency that needs to be changed is pynac. It is currently linked to libpython2.7 and this causes a segfault in sage. It can be switched to Python 3 by changing the Build-Dependency to python3-dev and passing PYTHON=python3 to configure. However, that seems to require a soname change (especially because the current one was also used in buster), so what do we do, custom soname until the next time upstream bumps it?
>>> I choose to ask upstream: https://github.com/pynac/pynac/issues/346 !
>>>
>>> JP
>>
>> I pushed the changes to the git repo. I could use some help figuring out the reasons for the ~126 failing doctests.
>>
>> Another issue is that the build log is 25 MB big because the docbuild prints this message all over:
>>
>> RemovedInSphinx20Warning: formatargspec() is now deprecated.  Please use sphinx.util.inspect.Signature instead.
>>
> Aren't you far behind the develop branch? Note that Sage 8.8 is far
> from being fully ported to Python 3.
> Sage 8.9.beta9 is much closer. (and this warning is gone too)
>
> Dima


Ok, thanks for the hint. I think I will just try the beta then.

The (almost) finished Python 3 port is coming just at the right time. The Python 2 removal in Debian has begun and sage is blocking lots of Python 2 packages from being removed. And even though this was not supposed to happen, the first Python 2 dependencies of sage were already removed from Debian.

Best,

Tobias