Sum of three given integers (condition)ΒΆ

Sum of three given integers.
However, if two values are equal sum will be zero.
def sum(x, y, z):
    if x == y or y == z or x==z:
        sum = 0
    else:
        sum = x + y + z
    return sum

print(sum(2, 1, 2))
print(sum(3, 2, 2))
print(sum(2, 2, 2))
print(sum(1, 2, 3))

Output:

0
0
0
6