title: Interleave multiple lists of the same length in Python
body: <p>In Python, is there a good way to interleave two lists of the same length?</p>
  
  <p>Say I'm given <code>[1,2,3]</code> and <code>[10,20,30]</code>. I'd like to transform those into <code>[1,10,2,20,3,30]</code>.</p>