How to check whether virtualenv was created with '--no-site-packages'?

Question

Sometimes I get errors that I suspect are the result of my Django app using globally installed Python modules/Django apps instead of those within its virtualenv.

Is

Answer 1

There's a file in /lib/pythonX.X/ called no-global-site-packages.txt when you create a virtual environment with --no-site-packages.

Just tried this with virtualenv 1.7:

% virtualenv --no-site-packages env.without
% virtualenv --system-site-packages env.with

% find env.without | sed 's/env.without//' > files.without
% find env.with | sed 's/env.with//' > files.with

% diff files.with*
230a231
> /lib/python3.2/no-global-site-packages.txt