trick

chunks.py

# coding: utf-8


def chunks(seq, chunk_size):
    '''Split a sequence into chunks.

    Source: http://stackoverflow.com/a/312464/1158494

    :param seq: sequence to be split.
    :param chunk_size: chunk size.
    '''
    assert(chunk_size > 0), 'Chunk size must be postive.'

    for i in range(0, len(seq), chunk_size):
        yield seq[i:i+chunk_size]