From mboxrd@z Thu Jan  1 00:00:00 1970
From: ludo@gnu.org (Ludovic =?utf-8?Q?Court=C3=A8s?=)
Subject: Re: PYTHONPATH issue analysis - part 3
Date: Tue, 13 Mar 2018 22:23:08 +0100
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	(Hartmut Goebel's message of "Sun, 11 Mar 2018 22:47:17 +0100")
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To: Hartmut Goebel <h.goebel@crazy-compilers.com>
Cc: guix-devel@gnu.org

Hello,

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

> Result
> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
>
> We can avoid all of the problems related to how Guix is using PYTHONPATH
> quite simple. This will work for virtual environments, too.

I may well have missed something (sorry about that!), but what are =E2=80=
=9Cthe
problems related to how Guix is using PYTHONPATH=E2=80=9D?

My first reaction is that Guix is not doing anything special with
PYTHONPATH, and only defining it as documented by upstream.

For example:

> Preliminary Proposal
> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
>
> To be able to install different minor versions of Python in the same
> profile, any environment variable should contain the minor version, too.
> E.g. =E2=80=A6-3.5.

If you=E2=80=99re suggesting to have a =E2=80=98PYTHONPATH3-5=E2=80=99 envi=
ronment variable
instead of =E2=80=98PYTHONPATH=E2=80=99, I agree it could be helpful if we =
are to
install different versions of Python in one profile.  However, it=E2=80=99s=
 a
choice for upstream to make, and upstream did not make that choice.

There=E2=80=99s one case where we went our way instead of following upstrea=
m,
and that is =E2=80=98GUIX_LOCPATH=E2=80=99.  There are strong justification=
s, though.

Thanks,
Ludo=E2=80=99.