What is the Python egg cache (PYTHON_EGG_CACHE)?

Question

I\'ve just upgraded from Python 2.6.1 to 2.6.4 on my development machine and upon starting a python script was presented with the following message:

C

Answer 1

A simple fix would be to create the directory and provide www-data access to it.

$ mkdir /var/www/.python-eggs
$ chown www-data:www-data /var/www/.python-eggs