[Python-3000] callable()
Raymond Hettinger
rhettinger at ewtllc.com
Thu Jul 20 18:38:06 CEST 2006
Guido van Rossum wrote:
>On 7/20/06, Walter Dörwald <walter at livinglogic.de> wrote:
>
>
>>str and unicode don't have __iter__, list, tuple and dict do:
>>
>>
>[...]
>
>
>>Should that be fixed too?
>>
>>
>
>Yes, please. (In Python 2.6 if you can.)
>
>
>
Why is the a defect? Have we abandoned the notion of SeqIter
automatically wrapping any object with __getitem__()?
IIRC, list and tuple have __iter__ simply as optimizations, it did not
change their functionality.
Raymond
-----------------
>>> class X:
def __getitem__(self, i):
if i < 5:
return i*5
raise IndexError
>>> for i in X():
print i
0
5
10
15
20
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