Sum of two integers

Question

How do you get the sum without using the operators +, - with python???
Here is my code:
class Solution:
def getSum(self, a, b):
print(sum1,2)
my problem is returning the integer 3 ??

Answer 1

>>> a = 1
>>> b = 2
>>> print a.__add__(b)
3

Answer 2

#Python
def sumbin(a,b):
if (a&b)==0: return a^b
return sumbin((a&b)<<1,a^b)
print(sumbin(7,33))