Pycharm error Django is not importable in this environment
Solution 1:
Yet another case, where my virtualenv did have Django installed, but Pycharm would still display this error.
I eventually found out that the same virtualenv path had been duplicated in the list of available interpreters. Removing all of them and re-adding fixed it.
The duplication happened after I copied the .idea from another machine, and re-created the virtualenv from Pycharm although it was already listed as a (broken) interpreter.
Solution 2:
In my case I had to go to Settings (Alt+F7, or the Spanner/Cog icon) and select a Python interpreter which has Django installed alongside it.
If Django isn't already installed, you should be able to install it via the + (plus) icon (not shown below) once an interpreter has been selected.