اینو بزار داخل vimrc احتمالا درست شه
"python with virtualenv support
py << EOF
import os
import sys
if 'VIRTUAL_ENV' in os.environ:
project_base_dir = os.environ['VIRTUAL_ENV']
activate_this = os.path.join(project_base_dir, 'bin/activate_this.py')
execfile(activate_this, dict(__file__=activate_this))
EOF