title: How to uncollapse a list with coma separated columns in python?
body: <p>I'm working in a code and I have a list like:</p>
  
  <pre><code>listA = (
      ['name1', 'A11,A12,A13', 'B11,B12,B13', 'C11,C12,C13'],
      ['name2', 'A21,A22', 'B21,B22', 'C21,C22'],
      ['name3', 'A31,A32,A33,A34,A35', 'B31,B32,B33,B34,B35', 'C31,C32,C33,C34,C35' ],
  )
  </code></pre>
  
  <p>and I need to get:</p>
  
  <pre><code>listA = (
      ['name1', 'A11', 'B11', 'C11'],
      ['name1', 'A12', 'B12', 'C12'],
      ['name1', 'A13', 'B13', 'C13'],
      ['name2', 'A21', 'B21', 'C21'],
      ['name2', 'A22', 'B22', 'C22'],
      ['name3', 'A31', 'B31', 'C31'],
      ['name3', 'A32', 'B32', 'C32'],
      ['name3', 'A33', 'B33', 'C33'],
      ['name3', 'A34', 'B34', 'C34'],
      ['name3', 'A35', 'B35', 'C35'],
  )
  </code></pre>
  
  <p>please help me, I'm staked.
  Thanks for your time.</p>