title: Writing a Python list of lists to a csv file
body: <p>I have a long list of lists of the following form ---</p>
  
  <pre><code>a = [[1.2,'abc',3],[1.2,'werew',4],........,[1.4,'qew',2]]
  </code></pre>
  
  <p>i.e. the values in the list are of different types -- float,int, strings.How do I write it into a csv file so that my output csv file looks like</p>
  
  <pre><code>1.2,abc,3
  1.2,werew,4
  .
  .
  .
  1.4,qew,2
  </code></pre>