title: Iterate through values of dictionary
body: <p>I have been trying to iterate through the values of my dictionary. The dictionary looks like this:</p>
  <pre><code>temperature = {
      'June': [25,25,26,27,25,25,24,27,28,28,31,32,33],
      'July': [34,34,36,39,39,38,39,37,39,41,41,39,37],
      'August': [37,37,36,37,35,35,34,37,38,34,32,33,31],
  }
  </code></pre>
  <p>and I am trying to find the month with the max value. So far my code i up to this point:</p>
  <pre><code>def minEl(dictionary):
      for key in dictionary:
          for i in key:
              for o in i:
                  l = min(((k,v[o]) for k,v in temperature.items()),key=lambda x:x[o])
                  return l
  </code></pre>
  <p>But the error message shows that I can't use a letter as list indices.</p>