Creating all possible combinations from two arrays

Question

I'm trying to think of an efficient way of solving the following problem:

Given any two arrays 'a' and 'b' I'd like to create all lists of combinations, each combination should contain tuples of one element from 'a' and one element from 'b'

for example:

a = ['p', 'q'], b = [True, False]

the output should be the following:

[{'p': False, 'q': False}, {'p': False, 'q': True}, {'p': True, 'q': 
False}, {'p': True, 'q': True}]

Answer 1

Hey you can use itertools.product with repeat=2

Here is a working example which builds a list of dictionaries

[{k1:v1, k2:v2} for k1,v1,k2,v2 in itertools.product(a,b,repeat=2) if k1 != k2]