wrong answer with the nested if in python

I expect 3 value in return but my code doesn't return anything .

Thanks

a = 3
if a > 0:
    if a == 1:
        print(1)
    elif a == 2:
        print(2)
elif a == 2:
    print(2)
elif a == 3:
    print(3)
else:
    print(a)