How to write a pager for Python iterators?

Question

I\'m looking for a way to \"page through\" a Python iterator. That is, I would like to wrap a given iterator iter and page_size with another iterator that wou

Answer 1

Look at grouper(), from the itertools recipes.

from itertools import zip_longest

def grouper(iterable, n, fillvalue=None):
    "Collect data into fixed-length chunks or blocks"
    # grouper('ABCDEFG', 3, 'x') --> ABC DEF Gxx"
    args = [iter(iterable)] * n
    return zip_longest(*args, fillvalue=fillvalue)