namedzip.py

# similar to Python's built in zip function, but yielding named tuples instead of tuples.
# i.e. list(namedzip(a=[1, 2], b=[3, 4])) => [namedzipitem(a=1, b=3), namedzipitem(a=2, b=4)]
# Author: Matthew Wigginton Conway <mwconway@asu.edu>
# feel free to use and share

from collections import namedtuple
def namedzip (**kwargs):
    keys = list(kwargs.keys())
    typ = namedtuple('namedzipitem', keys)
    length = len(kwargs[keys[0]])
    if not all([len(kwargs[key]) == length for key in keys[1:]]):
        raise IndexError('lengths much match')
                     
    for i in range(length):
        yield typ(**{ key: kwargs[key][i] for key in keys })