On Mon, 30 Jul 2001, Sami Hangaslammi <shang@cc.jyu.fi> wrote:
> Since iterator objects work like sequences in several contexts, maybe they
> could support sequence-like operations such as addition. This would let
> you write
>
> for x in iter1 + iter2:
> do_something(x)
>
> instead of
>
> for x in iter1:
> do_something(x)
>
> for x in iter2:
> do_something(x)
>
> or the slightly better
>
> for i in iter1,iter2:
> for x in i:
> do_something(x)
No, instead of:
class concat:
def __init__(self, *iterators):
self.iterators = list(iterators)
def __iter__(self): return self
def next(self):
while self.iterators:
try:
return self.iterators[0].next()
except StopIteration:
del self.iterators[0]
else:
raise StopIteration
for x in concat(iter1, iter2):
do_something(x)
(Note that the first n-2 lines can be refactored. Wasn't there talk
about having an iterator module with useful stuff like that?)
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