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<H1>[Mageia-dev] python-virtualenv: package default settings question</H1>
<B>Lev Givon</B>
<A HREF="mailto:mageia-dev%40mageia.org?Subject=Re%3A%20%5BMageia-dev%5D%20python-virtualenv%3A%20package%20default%20settings%0A%09question&In-Reply-To=%3C20120221155813.GE20159%40avicenna.ee.columbia.edu%3E"
TITLE="[Mageia-dev] python-virtualenv: package default settings question">lev at columbia.edu
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<I>Tue Feb 21 16:58:13 CET 2012</I>
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<PRE>Received from Marja van Waes on Tue, Feb 21, 2012 at 04:42:20AM EST:
><i> On 20/02/12 20:15, Lev Givon wrote:
</I>><i> >See <A HREF="https://bugs.mageia.org/show_bug.cgi?id=3358#c3">https://bugs.mageia.org/show_bug.cgi?id=3358#c3</A>
</I>><i> >Anyone care to comment?
</I>><i> >
</I>><i> > L.G.
</I>><i> To make replying easier, here is the question from the above link:
</I>><i>
</I>><i> > By default, virtualenv creates virtual environments using setuptools rather
</I>><i> > than distribute. This causes virtualenv to complain if PYTHONDONTWRITEBYTECODE
</I>><i> > is set (which is the default in Mageia):
</I>><i>
</I>><i> > The PYTHONDONTWRITEBYTECODE environment variable is not compatible with
</I>><i> > setuptools. Either use --distribute or unset PYTHONDONTWRITEBYTECODE.
</I>><i>
</I>><i> > Do we effectively want to require users to explicitly set the variable in order
</I>><i> > to use virtualenv with its default settings? (If we do, I can add an
</I>><i> > installation message to the package to warn users to unset the variable
</I>><i> > themselves.)
</I>><i>
</I>><i>
</I>><i> To me current behaviour as described above sounds strange, even
</I>><i> irritating, but I'm not a packager and I don't even use the package,
</I>><i> so I don't know enough.
</I>><i>
</I>><i> @ Lev
</I>><i> I understand in Mandriva virtualenv the default settings can be used
</I>><i> without having to unset a variable, and that that doesn't cause
</I>><i> other problems. Is that correct?
</I>
The Mandriva package uses the same approach as the one in Mageia,
i.e., PYTHONDONTWRITEBYTECODE is unset within
/usr/bin/virtualenv so that it will run successfully without requiring
that the user explicitly unset the variable or run the script with a
specific flag.
Given that the variable is only set when virtualenv is run to create a
virtual environment and does not affect the variable's setting in a
user's session, I'm inclined to leave the package as-is.
><i> If so, and if no one cares to reply to this mail or in the bug
</I>><i> report, I think you can just go ahead and change the default
</I>><i> environment variable from PYTHONDONTWRITEBYTECODE to whatever
</I>><i> Mandriva's default is. If that causes any new problems, we'll find
</I>><i> out soon enough when the package is in cauldron ;)
</I>><i>
</I>><i> Regards,
</I>><i> Marja
</I>
L.G.
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