title: How to break a list comprised of several lists into just one list?
body: <p>I am coding in Python.</p>
  
  <p>I am able to write code that returns a list of dates, which I want. Now, for every date, I would like to find the cell value for that date. In order to do that I wrote a for loop:</p>
  
  <pre><code>element = []
  for item in result:
      cell_list = worksheet2.findall(item)
      element.append(cell_list)
  </code></pre>
  
  <p>When I print element, the code returns the following response: </p>
  
  <pre><code>[[&lt;Cell R6C3 '2/18/2015'&gt;, &lt;Cell R11C3 '2/18/2015'&gt;], [&lt;Cell R16C3 
  '2/19/2015'&gt;, &lt;Cell R21C3 '2/19/2015'&gt;, &lt;Cell R26C3 '2/19/2015'&gt;, &lt;Cell R31C3 
  '2/19/2015'&gt;, &lt;Cell R36C3 '2/19/2015'&gt;, &lt;Cell R41C3 '2/19/2015'&gt;], [&lt;Cell 
  R46C3 '3/10/2015'&gt;, &lt;Cell R51C3 '3/10/2015'&gt;, &lt;Cell R56C3 '3/10/2015'&gt;], 
  [&lt;Cell R61C3 '3/17/2015'&gt;, &lt;Cell R66C3 '3/17/2015'&gt;, &lt;Cell R71C3 '3/17/2015'&gt;, 
  &lt;Cell R76C3 '3/17/2015'&gt;, &lt;Cell R81C3 '3/17/2015'&gt;, &lt;Cell R86C3 '3/17/2015'&gt;, 
  &lt;Cell R91C3 '3/17/2015'&gt;, &lt;Cell R96C3 '3/17/2015'&gt;], [&lt;Cell R101C3 
  '3/18/2015'&gt;, &lt;Cell R106C3 '3/18/2015'&gt;, &lt;Cell R111C3 '3/18/2015'&gt;, &lt;Cell 
  R116C3 '3/18/2015'&gt;, &lt;Cell R121C3 '3/18/2015'&gt;, &lt;Cell R126C3 '3/18/2015'&gt;, 
  &lt;Cell R131C3 '3/18/2015'&gt;]]
  </code></pre>
  
  <p>How do I get the code to not put several lists into one list? I just want one big list with all of those cells instead of several list in one list.</p>