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Fri Mar 9 10:04:46 CET 2007 · https://mail.python.org/pipermail/python-dev/2007-March/071774.html

On 3/9/07, Anthony Baxter <anthony at interlink.com.au> wrote:
>
> What do people think about the idea of a version-specific PYTHONPATH
> environment variable? Something like PYTHON25PATH or the like.
> Reason I ask is that on our production systems, we have a couple of
> versions of Python being used by different systems. Yes, yes, in a
> perfect world they'd be all updated at the same time, sure. There's
> occasionally issues with the PYTHONPATH being pointed at something
> like .../lib/python2.4/site-packages or the like, and then have
> issues when python2.3 or some other different version is run. If we
> allowed people to optionally specify a more specific version this
> problem would go away.

Few weeks ago I actually needed exactly this functionality. I worked around
it with a .pth file installed for
each version of python I'm using with the following contents:

import sys; sys.path.insert(0, os.path.expanduser("~/pylib%s.%s" %
sys.version_info[:2]))
import site, os, sys; site.addsitedir(os.path.expanduser("~/pylib%s.%s" %
sys.version_info[:2]))
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[Python-Dev] version-specific PYTHONPATH env var