[Python-Dev] PEP 3142: Add a "while" clause to generator expressions

[Antoine Pitrou]

Alexey G. Shpagin <python-3000 <at> udmvt.ru> writes:
> 
> Example will look like
>  g = (n for n in range(100) if n*n < 50 or else_break())

Please don't suggest any hack involving raising StopIteration as part of a
conditional statement in a generator expression. It might work today, but it
might as well break tomorrow as it's only a side-effect of the implementation,
not an official property of the language.

Regards

Antoine.