title: Better way to check if all lists in a list are the same length?
body: <p>Currently running with:</p>
  
  <pre><code>l1 = [i for i in range(0,10)]
  l2 = [i for i in range(0,10)]
  l3 = [i for i in range(0,10)]
  lists = [l1, l2, l3]
  length = len(lists[0])
  for l in lists:
      if length != len(l):
          raise ValueErrorr('not all lists have same length!')
  </code></pre>
  
  <p>Is there a prettier way to test for this than a <code>for</code> loop? Is there a faster/better way which isn't <code>O(n)</code> ?</p>