How can I calculate average of different values in each key of python dictionary?

Question

I have a dictionary. I want to calculate average of values for each key and print result so that the result shows key and associated average. The following code calculates mean

Answer 1

Update for Python 3.4+

>>> from statistics import mean    # Python 3.4+
>>> d = {22: [1, 0, 0, 1], 23: [0, 1, 2, 1, 0], 24: [3, 3, 2, 1, 0]}
>>> {k:mean(v) for k,v in d.items()}
{22: 0.5, 23: 0.8, 24: 1.8}
>>>