面向对象编程的一个主要优点是重用。继承是实现同样的机制之一。在继承中，类（通常称为超类）由另一个类（通常称为子类）继承。子类为超类添加了一些属性。

下面是一个示例Python程序，用于说明如何在Python中实现继承。

# A Python program to demonstrate inheritance

# Base or Super class. Note object in bracket.

# (Generally, object is made ancestor of all classes)

# In Python 3.x "class Person" is

# equivalent to "class Person(object)"

class Person(object):

# Constructor

def __init__(self, name):

self.name = name

# To get name

def getName(self):

return self.name

# To check if this person is employee

def isEmployee(self):

return False

# Inherited or Sub class (Note Person in bracket)

class Employee(Person):

# Here we return true

def isEmployee(self):

return True

# Driver code

emp = Person("Geek1") # An Object of Person

print(emp.getName(), emp.isEmployee())

emp = Employee("Geek2") # An Object of Employee

print(emp.getName(), emp.isEmployee())

输出 :

Geek1 False
Geek2 True