Chunking bytes (not strings) in Python 2 and 3

Question

This is turning out to be trickier than I expected. I have a byte string:

data = b\'abcdefghijklmnopqrstuvwxyz\'

I want to read this data in c

Answer 1

Funcy (a library offering various useful utilities, supporting both Python 2 and 3) offers a chunks function that does exactly this:

>>> import funcy
>>> data = b'abcdefghijklmnopqrstuvwxyz'
>>> list(funcy.chunks(6, data))
[b'abcdef', b'ghijkl', b'mnopqr', b'stuvwx', b'yz']   # Python 3
['abcdef', 'ghijkl', 'mnopqr', 'stuvwx', 'yz']        # Python 2.7

Alternatively, you could include a simple implementation of this in your program (compatible with both Python 2.7 and 3):

def chunked(size, source):
    for i in range(0, len(source), size):
        yield source[i:i+size]

It behaves the same (at least for your data; Funcy's chunks also works with iterators, this doesn't):

>>> list(chunked(6, data))
[b'abcdef', b'ghijkl', b'mnopqr', b'stuvwx', b'yz']   # Python 3
['abcdef', 'ghijkl', 'mnopqr', 'stuvwx', 'yz']        # Python 2.7