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

I like the variation of your second method:

   res = dict((a, b) for (a, b) in kwargs.iteritems() if b is not None)

it's Pythonic and I don't think that ugly. A variation of your first is:

   for (a, b) in list(kwargs.iteritems()):
       if b is None:
            del kwargs[a]