Why the module has been installed but not seen?
foo@bar:~/PycharmProjects/my$ virtualenv env
New python executable in /home/foo/PycharmProjects/my/env/bin/python
Installing setuptools, pip, wheel...done.
foo@bar:~/PycharmProjects/my$ source ./env/bin/activate
(env) foo@bar:~/PycharmProjects/my$ pip install django
Traceback (most recent call last):
File "/home/pavel/PycharmProjects/my/env/bin/pip", line 7, in <module>
from pip import main
ImportError: No module named pip
(env) foo@bar:~/PycharmProjects/my$ which pip
/home/foo/PycharmProjects/my/env/bin/pip