title: module 'pandas' has no attribute 'tslib'
body: <p>I am unable to use <code>ggplot</code> package in python .</p>
  <pre class="lang-py prettyprint-override"><code>import pandas as pd
  
  from ggplot import *
  
  
  import pandas as pd
  
  from ggplot import *
  </code></pre>
  <p>It returns:</p>
  <blockquote>
  <p>AttributeError: module 'pandas' has no attribute 'tslib'</p>
  </blockquote>