title: ImportError: No module named 'sha'
body: <p>all, I tried to <code>import sha</code> in a <code>python</code> file, but got the error message when compiling the file.</p>
  
  <pre><code>ImportError: No module named 'sha'
  </code></pre>
  
  <p>I am using <code>pycharm 4.0.4</code> with <code>python 3.4.2</code> installed on <code>Win 7</code>. I am wondering how to solve the problem.</p>