title: A TypeError because the list indices must be integers or slices, and not tuple
body: <p>I've tried my best to search for ways to fix a problem With arrays and tuples, but i couldn't find anything that helped me. This is the problem:</p>
  
  <p>TypeError: list indices must be integers or slices, not tuple</p>
  
  <p>I'm creating a text based game where i use arrays inside arrays to make a map:</p>
  
  <pre><code>maps = [
  [
      #Room 1
      ['0','0','0','0','0'],
      ['0','x','.','x','0'],
      ['0','x','x','x','0'],
      ['0','.','x','.','0'],
      ['0','0','0','0','0']
  ]
  [
      #Room 2
      ['0','0','0','0','0'],
      ['0','.','x','.','0'],
      ['0','x','x','x','0'],
      ['0','.','.','x','0'],
      ['0','0','0','0','0']
  ]
  ]
  </code></pre>
  
  <p>Unfortunately, the last array gives me the TypeError:
     TypeError: list indices must be integers or slices, not tuple
  The code looks like this:</p>
  
  <pre><code>['0','0','0','0','0']
  </code></pre>
  
  <p>What have i done wrong?</p>