List matrix thingy

listmatrix.py

vals = [1,2,3]

def afunc(v1, v2):
    return v1 * v2

for k in vals:
    for j in vals:
        print(afunc(k, j))

# Result
1
2
3
2
4
6
3
6
9

# One-liner
print ([afunc(x, y) for x in vals for y in vals])

# Result
[1, 2, 3, 2, 4, 6, 3, 6, 9]