What's the best way to obtain all the combinations (Cartesian product) of lists?
multidimensional-array, python
Solution
from itertools import product
a = [[1,2,3],[4,5,6],[7,8,9]]
b = [['a','b'],['c','d'],['e','f']]
print [x+y for (x,y) in product(a,b)]
Problem
Suppose I have the following. ``` a = [[1,2,3],[4,5,6],[7,8,9]] b = [['a','b'],['c','d'],['e','f']] ``` How do I obtain the following? ``` [1,2,3,'a','b'] [1,2,3,'c','d'] [1,2,3,'e','f'] [4,5,6,'a','b'] [4,5,6,'c','d'] [4,5,6,'e','f'] [7,8,9,'a','b'] [7,8,9,'c','d'] [7,8,9,'e','f'] ```