virtualenv not copying the existing python modules

Question

python -c 'import pyscopg2'

this works fine.

Now I create a virtualenv

virtualenv venv

and activate it

source venv/bin/activate

and run the following

python -c 'import pyscopg2'

But it gives error 'ImportError: No module named pyscopg2'

Answer 1

You should create virtual environment using --system-site-packages option to access system package.

According to virtualenv --help:

--no-site-packages    Don't give access to the global site-packages dir to
                      the virtual environment (default)
--system-site-packages
                      Give access to the global site-packages dir to the
                      virtual environment