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

Why aren't you using this?

def grouper( page_size, iterable ):
    page= []
    for item in iterable:
        page.append( item )
        if len(page) == page_size:
            yield page
            page= []
    yield page

"Each page would itself be an iterator with up to page_size" items. Each page is a simple list of items, which is iterable. You could use yield iter(page) to yield the iterator instead of the object, but I don't see how that improves anything.

It throws a standard StopIteration at the end.

What more would you want?