title: flaskr tutorial; can't import flaskr (initialize database)
body: <p>I'm new to programming, and tried to work through the flask tutorial.
  <a href="http://flask.pocoo.org/docs/tutorial/" rel="noreferrer">http://flask.pocoo.org/docs/tutorial/</a></p>
  
  <p>I'm stuck on this part (from the readme on github) when trying to run the app:
  <a href="https://github.com/mitsuhiko/flask/tree/master/examples/flaskr/" rel="noreferrer">https://github.com/mitsuhiko/flask/tree/master/examples/flaskr/</a></p>
  
  <p>Fire up a python shell and run this:</p>
  
  <pre><code>from flaskr import init_db; init_db()
  </code></pre>
  
  <p>I get this error when I try to run the command in python shell:</p>
  
  <pre><code>Import error: No module named flaskr
  </code></pre>
  
  <p>And I get this error when I try to run app locally:</p>
  
  <pre><code>sqlite3.OperationalError
  OperationalError: unable to open database file
  </code></pre>
  
  <p>I've been looking for solution for several hours now, but to no avail.
  Any thoughts on what I could check?  Thank you.</p>