title: flask.cli.NoAppException [flaskr tutorial]
body: <p>Wow, so I feel incredibly silly for posing this question, but what am I doing wrong?</p>
  
  <p>When accessing the server (<a href="http://127.0.0.1:5000/" rel="nofollow noreferrer">http://127.0.0.1:5000/</a>), I repeatedly get the error: </p>
  
  <pre><code>flask.cli.NoAppException: Could not import "flaskr.flaskr".
  
  pwd: ./flask/flaskr
  </code></pre>
  
  <p>Then I researched the error and found <a href="https://stackoverflow.com/questions/50574293/flask-cli-noappexception-could-not-import-flaskr-flaskr?noredirect=1&amp;lq=1">this</a> to be most relevant to my problem, but I [cd ..] to pwd [./flask] but received a 404 error.  This has been plaguing me all day and I would greatly appreciate aid!</p>
  
  <p>Thanks in advance!</p>