title: moduleNotFoundError: No module named 'booktime.main'
body: <p>following a book, I created a django project named booktime then an app named main. as I try importing files within the app such as forms.py as in from main import forms the names main and forms are red-underlined, though works in some cases as in views.py where the server runs still
  but on running tests file I get no module named 'booktime.main' error</p>