[Python-ideas] for/else syntax

[Gerald Britton]

Nope:

>>> l = []
>>> for i,j in enumerate(l): pass
...
>>> i
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
NameError: name 'i' is not defined


"i" is not initialized if "l" is empty.

On Fri, Oct 2, 2009 at 9:54 AM, Yuvgoog Greenle <ubershmekel at gmail.com> wrote:
>
> On Fri, Oct 2, 2009 at 4:46 PM, Gerald
> Britton <gerald.britton at gmail.com> wrote:
>>
>> I can't imagine why I'm still commenting on this thread, since there
>> is no chance that Python will remove the "else" from for/while or put
>> conditions on it, but here is an example of a use that has no break
>> statement:
>>
>> for i, j in enumerate(something):
>>  # suite
>>  i += 1
>> else:
>>  i = 0
>>
>> # i == number of things processed
>>
>
> Sorry, there must be some typo in your code. The "i" is always 0 after the
> loop unless you break.
>>>> for i, j in enumerate(range(10)):
> ...     i +=1
> ... else:
> ...     i = 0
> ...
>>>> i
> 0
>>>>
> Also, why would one increment the enumeration index "i" by hand?
>



-- 
Gerald Britton