On Tue, Feb 10, 2015 at 5:16 PM, Charles Hixson <charleshi...@earthlink.net> wrote: > Yes, rows and cols are lists, but I'm going to need to iterate through them > more than once. I'd rather do without a included class, but if a properly > formed iterator can only be cycled through once, and if I understand > properly that means I can't use the "class instance is it's own iterator" > form.
When you write __iter__ as a generator function, what you actually have is a factory for iterator objects. (Generators are iterators.) When something calls __iter__ on your Grid, it gets back a brand new iterator which is independent of every other iterator from that or any other Grid, so you can iterate over the same Grid more than once. You're not writing __next__ here, so you're not using the class instance as its own iterator, which means that that consideration doesn't apply. ChrisA -- https://mail.python.org/mailman/listinfo/python-list
