How I can get rid of None values in dictionary?

Question

Something like:

for (a,b) in kwargs.iteritems():
    if not b : del kwargs[a]

This code raise exception because changing of dictionary when

Answer 1

Another way to write it is

res = dict((k,v) for k,v in kwargs.iteritems() if v is not None)

In Python3, this becomes

res = {k:v for k,v in kwargs.items() if v is not None}