def assert_same_and_nonzero(a, b, c):

    if a == 0 or b == 0 or c == 0:
        return False

    if a == b == c:
        return True

    return False

a = [1,1,1,2,1,2,2,1,2]
for i in range(3):
    row_index =3*i
    col_index = i
    print(assert_same_and_nonzero(*a[row_index:row_index+3]))
    print(assert_same_and_nonzero(*a[col_index::3]))

print(assert_same_and_nonzero(a[0], a[4], a[8]))
print(assert_same_and_nonzero(a[2], a[4], a[6]))