title: Drop Elements from Pandas Series by Index
body: <p>I have a pandas series df (dates = index):</p>
  
  <pre><code>2015-09-10     58
  2015-09-11     40
  2015-09-12     33
  2015-09-13     42
  2015-09-14     22
  2015-09-15     88
  2015-09-16     99
  2015-09-17    124
  </code></pre>
  
  <p>I'd like to drop the dates from 2015-09-11 to 2015-09-15, so my df would look like:</p>
  
  <pre><code>2015-09-10     58
  2015-09-16     99
  2015-09-17    124
  </code></pre>
  
  <p>I've tried using df.drop["2015-09-11":"2015-09-15"], but i get an error:</p>
  
  <pre><code>TypeError: 'instancemethod' object has no attribute '__getitem__'
  </code></pre>
  
  <p>Any advices?</p>
  
  <p>Thanks!</p>