Ok, thanks @dfan for telling me I was looking in the wrong place. I’ve got it now:
from itertools import product
def my_product(inp):
return (dict(zip(inp.keys(), values)) for values in product(*inp.values())
EDIT: after years more Python experience, I think a better solution is to accept kwargs
rather than a dictionary of inputs; the call style is more analogous to that of the original itertools.product
. Also I think writing a generator function, rather than a function that returns a generator expression, makes the code clearer. So:
def product_dict(**kwargs):
keys = kwargs.keys()
vals = kwargs.values()
for instance in itertools.product(*vals):
yield dict(zip(keys, instance))
and if you need to pass in a dict, list(product_dict(**mydict))
. The one notable change using kwargs
rather than an arbitrary input class is that it prevents the keys/values from being ordered, at least until Python 3.6.