title: Some python tutorials for Windows use "py -3" to invoke Python. It does not work for me
body: <p>I installed python 3.8 from the Windows store. Typing "python" works.  Why does py -3  not work for me?  I re-did all the steps in the main tutorial I was following.</p>
  
  <p>It says "py" is not found as any of a bunch of things it could be.</p>