Conditional iteration

[at]

Thanx Paul!

Do you know if this generates a new list internally (memory consumption?)

@


Paul Rubin wrote:

> at <at at tuko.nl> writes:
>> You proposal, seems nice to me but it doesn't work with Python 2.4.3,
>> should it work with 2.5?
>> 
>> Again I am just wondering if the approach for
>> 
>>         [x for c x in some_list if some_condition]
>> 
>> and
>>         x = a if b else c
>> 
>> could be generalized for normal straight forward iterations:
>> 
>> for x in some_list if some_condition:
> 
> Sorry, I got it wrong.  Should have said:
> 
>    for x in (x for x in some_list if some_condition):
>           ...
> 
> So your example would have been:
> 
>   for x in (x for x in [-2, -1, 0, 1, 2, 3, 4] if x > 0):
>        ... more code ...
> 
> It should work in 2.4.