title: Create a 2D list out of 1D list
body: <p>I am a bit new to Python and I want to convert a 1D list to a 2D list, given the <code>width</code> and <code>length</code> of this <code>matrix</code>.</p>
  
  <p>Say I have a <code>list=[0,1,2,3]</code> and I want to make a <code>2 by 2</code> matrix of this list.</p>
  
  <p>How can I get <code>matrix [[0,1],[2,3]]</code> <code>width</code>=2, <code>length</code>=2 out of the <code>list</code>?</p>