Recipe for chunking an iterable

chunker.py

import itertools

def chunker(iterable, n):
    """Collect data into chunks.

    This is different to the grouper recipe in itertools in that the final
    chunk may be shorter.

    >>> chunks = chunker('abcde', 2)
    >>> list(chunks)
    [['a', 'b'], ['c', 'd'], ['e']]
    >>> chunks = chunker('abcde', 10)
    >>> list(chunks)
    [['a', 'b', 'c', 'd', 'e']]
    """
    iterator = iter(iterable)
    chunk = list(itertools.islice(iterator, n))

    while chunk:
        yield chunk
        chunk = list(itertools.islice(iterator, n))