[Python-Dev] Proposal: defaultdict (original) (raw)

"Martin v. Löwis" martin at v.loewis.de
Sat Feb 18 00:07:48 CET 2006

Adam Olsen wrote:

You could pass a float in as well. But if the function is documented as taking a dict, and the programmer expects a dict.. that now has to be changed to "dict without a default". Or they have to code defensively since d[key] may or may not raise KeyError, so they must avoid depending on it either way.

Can you give an example of real, existing code that will break if a such a dict is passed?

Regards, Martin

More information about the Python-Dev mailing list