rodrigo a écrit :
> Im using this construct a lot:
>
> if dict.has_key(whatever):
<ot>
Avoid using builtin names as identifiers (it shadows the builtin name).
</ot>
Unless you're using an old Python version, you'd be better using
if whatever in my_dict:
# do something here
> dict[whatever] += delta
> else:
> dict[whatever] = 1
>
> sometimes even nested:
>
> if dict.has_key(whatever):
> if dict[whatever].has_key(someother):
> dict[whatever][someother] += delta
> else:
> dict[whatever][someother] = 1
> else:
> dict[whatever]={}
> dict[whatever][someother] = 1
>
> there must be a more compact, readable and less redundant way to do
> this, no?
There are other ways, yes. With Python <= 2.4.x, you can use
dict.setdefault, with Python 2.5.x you can use a defaultdict (cf
http://docs.python.org/whatsnew/modules.html).
HTH
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