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Thu Oct 8 18:17:32 CEST 2009 · https://mail.python.org/pipermail/python-dev/2009-October/092800.html

On Thu, Oct 08, 2009 at 02:52:24PM +0200, Simon Cross wrote:
>  On Thu, Oct 8, 2009 at 10:31 AM, Tarek Ziadé <ziade.tarek at gmail.com> wrote:
> > = Virtualenv and the multiple version support in Distribute =
> ...
> > My opinion is that this tool exists only because Python doesn't
> > support the installation of multiple versions for the same
> > distributions.
> 
Let's actually look at these reasons:

> This is not at all how I use virtualenv. For me virtualenv is a
> sandbox so that I don't have to become root whenever I need to install
> a Python package for testing purposes

This is needing to install multiple versions and use the newly installed
version for testing.

> and to allow me to hop between
> sets of installed Python packages while developing on multiple Python
> projects.

This is the ability to install multiple versions and specify different
versions for different projects you're working on.

> I also use it as a sandbox for build bots so that multiple
> bots on the same machine can each build their own projects with just
> the known dependencies installed.
> 
This is the only use in the list that is virtualenv specific.  The rest are
cases of needing to install multiple versions on the system.

-Toshio
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Showing content from https://mail.python.org/pipermail/python-dev/2009-October/092800.html below:

[Python-Dev] Distutils and Distribute roadmap (and some words on Virtualenv, Pip)