title: python regular expression split function issue
body: <p>I'm using <code>python2</code> and I want to get rid of these empty strings in the output of the following python regular expression: </p>
  
  <pre><code>import re
  x = "010101000110100001100001"
  print re.split("([0-1]{8})", x)
  </code></pre>
  
  <p>and the output is this :</p>
  
  <pre><code>['', '01010100', '', '01101000', '', '01100001', '']
  </code></pre>
  
  <p>I just want to get this output:</p>
  
  <pre><code>['01010100', '01101000', '01100001']
  </code></pre>