title: TypeError: 'itertools.combinations' object is not subscriptable
body: <p>When I try to run:</p>
  
  <pre><code>temp = (twoset2[x][i][0]-twoset[x][i][1])
  </code></pre>
  
  <p>I get:</p>
  
  <blockquote>
    <p>TypeError: 'itertools.combinations' object is not subscriptable</p>
  </blockquote>
  
  <p>My code:</p>
  
  <pre><code>for x in range(0,64):
      for i in range(0,1):
          temp = (twoset2[x][i][0]-twoset[x][i][1])
          DSET[counter2]= temp
          temp = 0
          counter2 += 1
  </code></pre>
  
  <p>Basically what I am trying to do is: I have a list (<code>twoset2</code>) of 2 element subsets of coordinates (so an example: <code>((2,0) (3,3)</code>). I want to access each individual coordinate, and then take the difference between <code>x</code> and <code>y</code> and place it into <code>DSET</code>, but I get the above error when trying to run.</p>
  
  <p>Please help!</p>