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

Based on the pointer to the itertools recipe for grouper(), I came up with the following adaption of grouper() to mimic Pager. I wanted to filter out any None results and wanted to return an iterator rather than a tuple (though I suspect that there might be little advantage in doing this conversion)

# based on http://docs.python.org/library/itertools.html#recipes
def grouper2(n, iterable, fillvalue=None):
    args = [iter(iterable)] * n
    for item in izip_longest(fillvalue=fillvalue, *args):
        yield iter(filter(None,item))

I'd welcome feedback on how what I can do to improve this code.