title: dev_appserver.py: command not found
body: <p>Trying to run a python app on Google app engine in Ubuntu like so</p>
  
  <pre><code>$ dev_appserver.py helloworld
  </code></pre>
  
  <p>where helloworld contains the file app.yaml</p>
  
  <p>but I am getting this error </p>
  
  <blockquote>
    <p>dev_appserver.py: command not found</p>
  </blockquote>