Martin v. Löwis <[email protected]> added the comment:
> By the way, defaultdict is NOT like setdefault--it is like get().
> Missing entries do no get set.
Why do you say that?
__missing__(...)
__missing__(key) # Called by __getitem__ for missing key; pseudo-code:
if self.default_factory is None: raise KeyError((key,))
self[key] = value = self.default_factory()
return value
In all cases of setdefault that I know of, replacing this with
a defaultdict would be appropriate. The only case where it wouldn't
work is if the default value depends on the key.
> What do you think?
If no speedup can be demonstrated, we should not change it.
----------
_______________________________________
Python tracker <[email protected]>
<http://bugs.python.org/issue5730>
_______________________________________
_______________________________________________
Python-bugs-list mailing list
Unsubscribe:
http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
