Lesson - 50 : Python Advanced - Python OOP’s : Operator Overloading
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Python OOP’s : Operator Overloading:
You have already seen you can use + operator for adding numbers and at the same time to concatenate strings. It is possible because + operator is overloaded by both int class andstr class. The operators are actually methods defined in respective classes. Defining methods for operators is known as operator overloading. For e.g. To use + operator with custom objects you need to define a method called _add_ .
Operator Function Method Description
__add__(self,other) Addition
__mul__(self,other) Multiplication
__sub__(self,other) Subtraction
% __mod__(self,other) Remainder
/ __truediv__(self,other) Division
＜ __lt__(self,other) Less than
＜= __le__(self,other) Less than or equal to
== __eq__(self,other) Equal to
!= __ne__(self,other) Not equal to
＞ __gt__(self,other) Grater than
＞= __ge__(self,other) Grater than or equal to
[index] __getitem__(self,other) index operator
in __contains__(self,other)check membership
len __len__(self,other) The number of elements
str __str__(self,other) The string representation
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