TypeError after overriding the __add__ method

Question

I am trying to understand how __add__ works:

class MyNum:
    def __init__(self,num):
        self.num=num
    def __add__(self,other):
                 


        

Answer 1

Another option is reduce (functools.reduce in Python 3.x).

from functools import reduce
from operators import add
d=[MyNum(i) for i in range(10)]
my_sum = reduce(add,d)