title: dictionary comprehension of multiple items in set in python
body: <p>How do I use dictionary comprehension to obtain the average of the student scores </p>
  
  <pre><code>co_dct = {"Juan":[90,85,98], "Lana":[94,80,100], "Alicia":[100,90], "Sam":[]}
  co_dct = d/d[] for d in co_dct
  print(co_dct)
  </code></pre>