From mboxrd@z Thu Jan  1 00:00:00 1970
From: ludo@gnu.org (Ludovic =?utf-8?Q?Court=C3=A8s?=)
Subject: Re: [PATCH] gnu: Add python-contextlib2
Date: Thu, 26 Nov 2015 14:44:38 +0100
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	(Chris Marusich's message of "Sat, 21 Nov 2015 13:28:41 -0800")
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To: Chris Marusich <cmmarusich@gmail.com>
Cc: "guix-devel@gnu.org" <guix-devel@gnu.org>

Hi!

Sorry for the delay.

Chris Marusich <cmmarusich@gmail.com> skribis:

> However, there is one curiosity. I've noticed that when I run
> "./pre-inst-env guix environment python2-contextlib2", the PYTHONPATH
> is configured to allow importation of contextlib2 from the
> $profile/lib/python3.4/site-packages directory tree, rather than
> $profile/lib/python2.7/site-packages. When I run python in this
> environment, I get a Python 2.7 interpreter.

The interpreter you get here is probably one that was already in PATH,
because the command above lacks --pure.

If you want to be sure, use:

  ./pre-inst-env guix environment --pure \
        python2-contextlib python-2 -- python

(Even better: --container instead of --pure.)

Can you confirm?

> I'm also curious: why does the "(#:phases" part need to be
> quasi-quoted with the backtick symbol "`"?

The #:phases part specified build code (info "(guix) G-Expressions").
That code is quoted because we don=E2=80=99t want to evaluate it; we merely=
 want
to pass the code itself for future execution in the build environment.

Does that make sense?

Thanks,
Ludo=E2=80=99.