[Debian-science-sagemath] sagemath and Python 3

[Tobias Hansen]

On 9/8/19 1:00 PM, Dima Pasechnik wrote:
> On Sun, Sep 8, 2019 at 11:41 AM Tobias Hansen <thansen at debian.org> wrote:
>> On 9/6/19 2:10 PM, Tobias Hansen wrote:
>>> 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
>>
>> Updating sagemath to 8.9.beta9 improved things. There are now 48 failing tests. The log is at [1]. Does anything look familiar to someone?
>>
> on a stock 8.9.beta9 with Python3 one gets roughly the following from ptestlong:
> ----------------------------------------------------------------------
> sage -t --long --warn-long 53.7
> src/sage/combinat/root_system/weyl_group.py  # 7 doctests failed
> sage -t --long --warn-long 53.7 src/sage/libs/eclib/interface.py  # 1
> doctest failed
> sage -t --long --warn-long 53.7
> src/sage/rings/polynomial/polynomial_rational_flint.pyx  # 1 doctest
> failed
> sage -t --long --warn-long 53.7 src/sage/repl/attach.py  # 4 doctests failed
> sage -t --long --warn-long 53.7 src/sage/libs/singular/function.pyx  #
> 1 doctest failed
> sage -t --long --warn-long 53.7
> src/sage/numerical/backends/generic_backend.pyx  # 2 doctests failed
> ----------------------------------------------------------------------
>
> So 10-15 tests are failing due to Sage's bugs, and the rest are likely
> Debian's own - probably different package versions of some components
> lead to this.

Good to know. The other bugs are more or less what we had already failing with Python 2.

I would say that's good enough for a first upload. Julien are you ready to upload pynac to unstable? I saw that you made two commits, don't forget to close #937486.

Best,

Tobias