Dynamic DEBUG setting for PyCharm

1. Next to the Play button you can Edit Configuration
2. Click the green + on the left, add 2 "Django Server". Call one DEBUG, call the other RUN.
3. Add "DEBUG False" to RUN in its "Environment variables"
4. Add "DEBUG True" to DEBUG in its "Environment variables" (make sure the port # is different from RUN!)

Change DEBUG = True in settings.py to the below code

Go back to the main IDE window and either select RUN or DEBUG and go to localhost/404 to either see the dev debug 404 or your custom 404.html (that you obviously previously made in the /templates/ folder ;)