Python __add__() magic method

Python __add__() function is one of the magic methods in Python that returns a new object(third) i.e. the addition of the other two objects. It implements the addition operator "+" in Python.

Python __add__() Syntax

Syntax: obj1.__add__(self, obj2)

• obj1: First object to add in the second object.
• obj2: Second object to add in the first object.                 

Returns: Returns a new object representing the summation of the other two objects.

Python __add__() magic method Example

Python __add__() method adds two objects and returns a new object as a resultant object in Python. The below example returns a new object,

class GFG:

    def __init__(self, val):
        self.val = val
        
    def __add__(self, val2):
        return GFG(self.val + val2.val)

obj1 = GFG("Geeks")
obj2 = GFG("ForGeeks")
obj3 = obj1 + obj2
print(obj3.val)

Output:

GeeksForGeeks

Note: If we had not defined the __add__() method, Python would have raised a TypeError.

class GFG:

    def __init__(self, val):
        self.val = val

obj1 = GFG("Geeks")
obj2 = GFG("ForGeeks")
obj3 = obj1 + obj2
print(obj3.val)

Output:

Traceback (most recent call last):
  File "/home/d8b3b04f2954b8c46b64bc7dd37f6aa4.py", line 11, in <module>
    obj3 = obj1 + obj2
TypeError: unsupported operand type(s) for +: 'GFG' and 'GFG'