title: How to left shift a bitarray in python
body: <p>I have a bit array named <code>c0</code> containing 28 bits </p>
  
  <pre><code>bitarray('1111011111111111111111110001')
  </code></pre>
  
  <p>how can I left shift this bit array for a number of times, meaning one left shift, two left shift, etc.? 
  One left shift is fine for now!</p>
  
  <p><strong>NOTE:</strong> This pertains to the <a href="https://pypi.python.org/pypi/bitarray/" rel="nofollow">bitarray</a> package.</p>