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'