title: List comprehension to extract a list of tuples from dictionary
body: <p>I'd like to use list comprehension on the following list; </p>
  
  <pre><code>movie_dicts = [{'title':'A Boy and His Dog', 'year':1975, 'rating':6.6},
             {'title':'Ran', 'year':1985, 'rating': 8.3},
             {'title':'True Grit', 'year':2010, 'rating':8.0},
             {'title':'Scanners', 'year':1981, 'rating': 6.7}]
  </code></pre>
  
  <p>using my knowledge of list comprehension and dictionaries, I know that </p>
  
  <pre><code>movie_titles = [x['title'] for x in movie_dicts]
  print movie_titles
  </code></pre>
  
  <p>will print a list with movie titles. </p>
  
  <p>In order to extracts a list of (title, year) tuples I've tried - </p>
  
  <pre><code>movie_tuples = [x for ('title','year') in movie_dicts]
  print movie_tuples
  </code></pre>
  
  <p>and I receive the error SyntaxError: can't assign to literal</p>
  
  <p>I'm unsure on how to fetch the two (specific) key/value pairs using list comprehension (doing so would generate a tuple automatically?)</p>