PyCharm: DJANGO_SETTINGS_MODULE is undefined
You can go to the tool bar which shows a dropdown and select your project ->edit configuration. There in the Environment variable area enter DJANGO_SETTINGS_MODULE  mysite.settings and save .
I am using PyCharm IDE and when I run any file.py I get this error:

..raise ImportError("Settings cannot be imported, because environment
  variable %s is undefined." % ENVIRONMENT_VARIABLE) ImportError:
  Settings cannot be imported, because environment variable
  DJANGO_SETTINGS_MODULE is undefined.

How to configure DJANGO_SETTINGS_MODULE environment variable in PyCharm?