On Wednesday, May 27, 2020 at 3:58:28 PM UTC-7, Matthias Koeppe wrote:
>
> On Wednesday, May 27, 2020 at 1:08:18 PM UTC-7, Volker Braun wrote:
>>
>> Which python versions do we want to be compatible with now? 
>>
>
> one needs to distinguish 
>
> A. sage-system-python
> (see build/bin/sage-system-python and build/tox.ini)
> This is a minimal build requirement. All Python versions (2.x, 3.x) listed 
> in build/tox.ini are supposed to be supported, though I am not sure if some 
> of the oldest ones have seen much testing.
>
> B. the python3 accepted by python3/spkg-configure.m4 for using for venv.
>
> There is nothing wrong with an spkg that declares python3 as a build 
> dependency and then uses sage-python23 (or just "python3" now...) at build 
> time. This is, after all, the same python that we use for "pip install".
>
>
To add on to this, I have also clarified the description of ticket 
https://trac.sagemath.org/ticket/29669 (Remove Python 2 support from the 
build system and CI scripts) that it does NOT affect sage-system-python at 
all.
 

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