operator.py

import operator
class ABC():
    def __init__(self,value=0):
        self.value=value
    def __iadd__(self,y):
        print(y)
        self.value+=y
a=ABC()
def func3():
    print(a.value,id(a))
    operator.iadd(a,1)
    print(a.value,id(a))
func3()