title: I cant install Flask
body: <p>I am trying to install flask but everytime i get this error 
  <code>ModuleNotFoundError: No module named 'flask'</code>. I have added python to path and have even reinstalled it but it just isnt working. I followed steps of activating virtual environment and using <code>pip install flask</code> but it still doesn't seem to work. I need to get my a level coursework completed in a week! Please help.</p>