On Mon, Jul 29, 2013 at 5:49 AM, Joshua Landau <jos...@landau.ws> wrote: > Also, couldn't Counter just extend from defaultdict?
It could, but I expect the C helper function in 3.4 will be faster since it doesn't even need to call __missing__ in the first place. And the cost (both in terms of maintenance and run-time) of adding defaultdict to the Counter MRO just to reuse one tiny __missing__ method seems questionable, especially after taking into account that the constructor signature is incompatible. -- http://mail.python.org/mailman/listinfo/python-list
