title: Extracting key/value pair from dictionary
body: <p>OK this is a Python question:</p>
  
  <p>We a have a dictionary:</p>
  
  <pre><code>my_dict = {
             ('John', 'Cell3', 5): 0, 
             ('Mike', 'Cell2', 6): 1, 
             ('Peter', 'Cell1', 6): 0, 
             ('John', 'Cell1', 4): 5, 
             ('Mike', 'Cell2', 1): 4, 
             ('Peter', 'Cell1', 8): 9
            }
  </code></pre>
  
  <p>How do you make another dictionary which has only the key/value pair which has the name "Peter" in it?</p>
  
  <p>Does it help if you turn this dictionary to a list of tuples of tuples, by </p>
  
  <pre><code>tupled = my_dict.items()
  </code></pre>
  
  <p>and then turn it back to a dictionary again?</p>
  
  <p>How do you solve this with list comprehension?</p>
  
  <p>Thanks in advance!</p>