On Sep 29, 10:34 am, "[EMAIL PROTECTED]" <[EMAIL PROTECTED]> wrote: > [EMAIL PROTECTED] wrote: > > > On 29 sep, 12:04, "[EMAIL PROTECTED]" <[EMAIL PROTECTED]> wrote: > > > >> for i in generator_a: # the first "for" cycle > >> for j in generator_b: > >> if something_happen: > >> # do something here ..., I want the outer cycle to break > >> break > > > > Do you like this? > > > > generator_ab = ((x, y) for x in generator_a for y in generator_b) > > for i, j in generator_ab: > > if condition: > > # do something > > break > > > In this case, the tuple generator_ab must be generated first.
It's not a tuple, it is a generator expression that can generate tuples *lazily*. > Sometime it maybe a waste to generate all possible combinations of i,j first. It doesn't; read about generator expressions at http://www.python.org/dev/peps/pep-0289/ George -- http://mail.python.org/mailman/listinfo/python-list
