title: Pycharm gets error "can't find '__main__' module"
body: <p>Whenever I try to run script via Virtualenv in pycharm, i get this error:</p>
  
  <pre><code>C:\Users\Costello\PycharmProjects\test\venv\Scripts\python.exe C:/Users/Costello/PycharmProjects/test
  C:\Users\Costello\PycharmProjects\test\venv\Scripts\python.exe: can't find '__main__' module in 'C:/Users/Costello/PycharmProjects/test'
  </code></pre>
  
  <p>Everything works fine via idle, or vs code. 
  I figure it must be something with a way that I have setup my pycharm but have no idea what. </p>
  
  <p>edit: this happens whatever I run, even simple print function. </p>
  
  <p>edit: even with choosing regular python intepreteur, same happens just in pycharm</p>
  
  <pre><code>C:\Users\Costello\AppData\Local\Programs\Python\Python37\python.exe: can't find '__main__' module in 'C:/Users/Costello/PycharmProjects/test'
  </code></pre>