[Python-Dev] Proposal: defaultdict

[Georg Brandl]

skip at pobox.com wrote:
>     Guido> Over lunch with Alex Martelli, he proposed that a subclass of
>     Guido> dict with this behavior (but implemented in C) would be a good
>     Guido> addition to the language.
> 
> Instead, why not define setdefault() the way it should have been done in the
> first place?  When you create a dict it has the current behavior.  If you
> then call its setdefault() method that becomes the default value for missing
> keys.

That puts it off until 3.0.

>From what I read I think defaultdict won't become builtin anyway.

Georg