Michael Chermside wrote: > There's one big problem I see with this. Parallel iteration > is underspecified... there are several reasonable choices > for what to do if the iterables are of differing length.
I have trouble seeing that as a *big* problem. I'd go for raising an exception (when in doubt...) Most of the time it's probably a bug if the sequences are of diffent lengths. If not, the user can catch the exception and take appropriate action. Especially if the exception includes info about which sequence was shorter. > Today, we support these with different idioms: > > (1) > result = map(some_func, seq_x, seq_y) > > (2) > for x, y in zip(seq_x, seq_y): > some_func(x, y) It's really only an accident that these correspond to different handlings of unequal length sequences, though, especially considering that we're trying to make the need for map() go away with things like zip() and LCs. If it were a deliberate feature, we'd have different versions of zip() corresponding to the different behaviours. Greg _______________________________________________ Python-3000 mailing list [email protected] http://mail.python.org/mailman/listinfo/python-3000 Unsubscribe: http://mail.python.org/mailman/options/python-3000/archive%40mail-archive.com
