cart_prod_for.py

a= [1,2,3,4]
b = [10,11]
cart_prod = []
for i in a:
  for j in b:
    cart_prod.append((i,j))

print cart_prod
# Output:
# [(1, 10), (1, 11), (2, 10), (2, 11), (3, 10), (3, 11), (4, 10), (4, 11)]