[Python-ideas] Statements vs Expressions... why?

[Arnaud Delobelle]

On 14 Sep 2008, at 10:25, Cliff Wells wrote:

>> Now say you want to write that inline with a for-expression:
>>
>>     '-'.join(
>> 	for J in I:
>>             for j in J:
>>                 YIELD j
>> 	)
>>
>> That won't work because the j's will be accumulated in the inner loop
>> and the outer loop won't accumulate anything, therefore returning an
>> empty iterable.
>
> How about this way instead (since for-loop is now an expression):
>
> '-'.join(
>    for j in ( for J in I: YIELD J ): YIELD j
> )

After you've had a good night's sleep and when you look at this again,  
you'll definitely think that you were too hasty in replying :)

-- 
Arnaud