A tiny function for interleaving lists with configurable amounts from each list in each chunk.

interleave_list_chunks.py

def interleave_chunks(lists):
    while lists:
        items, amount = lists.pop(0)

        subset = items[0:amount]
        items = items[amount:]

        if subset:
            for item in subset:
                yield item

        if items:
            lists.append((items, amount))

        if not lists:
            raise StopIteration


## Example usage:
lists = [
    (
        range(1,10), # List
        1            # Amount from list
    ),
    (range(100,150), 2),
]

for bit in interleave_chunks(lists):
    print bit