Question

I have an array of bytes and what I want to do is take four bytes from the array, do something with it and then take the next four bytes. Is it at all possible to do this is a list comprehension or make a for loop take four items from the array instead of one?

Answer 1

Another option is using itertools

http://docs.python.org/library/itertools.html

by using the grouper() method

def grouper(n, iterable, fillvalue=None):
    "grouper(3, 'ABCDEFG', 'x') --> ABC DEF Gxx"
    args = [iter(iterable)] * n
    return izip_longest(fillvalue=fillvalue, *args)