title: Convert spark dataframe to list of tuples without pandas dataframe
body: <p>I have an existing logic which converts pandas dataframe to list of tuples.</p>
  
  <pre class="lang-py prettyprint-override"><code>list(zip(*[df[c].values.tolist() for c in df])) 
  </code></pre>
  
  <p>where df is a pandas dataframe.</p>
  
  <p>Somebody please help me implement the same logic without pandas in pyspark.</p>