title: Python split for lists
body: <p>If we have a <code>list</code> of <code>strings</code> in python and want to create sublists based on some special <code>string</code> how should we do?</p>
  
  <p>For instance:</p>
  
  <pre><code>l = ["data","more data","","data 2","more data 2","danger","","date3","lll"]
  p = split_special(l,"")
  </code></pre>
  
  <p>would generate:</p>
  
  <pre><code>p = [["data","more data"],["data 2","more data 2","danger"],["date3","lll"]]
  </code></pre>