title: using index() on multidimensional lists
body: <p>For a one dimensional list, the index of an item is found as follows:</p>
  
  <pre><code> a_list = ['a', 'b', 'new', 'mpilgrim', 'new']
   a_list.index('mpilgrim')
  </code></pre>
  
  <p>What is the equivalent for a 2 or n dimensional list?</p>
  
  <p>Edit: I have added an example to clarify:
  If I have a 3 dimensional list as follows</p>
  
  <pre><code>b_list = [
            [1,2],
            [3,4],
            [5,6],
            [7,8]
           ],
           [
            [5,2],
            [3,7],
            [6,6],
            [7,9]
           ]
  </code></pre>
  
  <p>Now lets say I want to identify a certain value in this list. If I know the index of the 1st and 2nd dimesion but don't know the zero-th index for the value I want, how do I go about finding the zero-th index?</p>
  
  <p>Would it be something like:</p>
  
  <pre><code>  target_value = 7
    b_list[0].index(target_value)
  </code></pre>
  
  <p>With the output being an integer:
      0</p>