EDITING IN PROGRESS
This page describes how we upgraded python and django and how we installed python virtualenv.
We are using virtualenv to simplify our upgrade from python 2.5/django 1.1 to python 2.7/django 1.3.
More to the point, we may need to release an emergency patch to PROD while we are in the middle of upgrading python and django in QA.
This will also simplify future upgrades.
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