I have two defaultdict :
defaultdict(<type 'list'>, {'a': ['OS', 'sys', 'procs'], 'b': ['OS', 'sys']})
defaultdict(<type 'list'>, {'a': ['OS', 'sys'], 'b': ['OS']})
How do I compare these two to get the count of values missing from each one.
For example I should get two values are missing from second defaultdict for key 'a' and one missing from 'b'.