Python Inheritance
Python Tutorial » Python Inheritance
Inheritance allows to define a class that inherits all the methods and properties from another class.
Inheritance is a powerful feature in object oriented programming.
1. Base or Parent class.
2. Derived or Child class.
Create Base or Parent class
Create a class named Town, with town_name and town_population properties, and a printname method:
Example:
Output: London with 12000 K
class Town:
def __init__(self, town_name, town_population):
self.town_n = town_name
self.town_p = town_population
def printname(self):
print(self.town_n, self.town_p)
#Use the Town class to create an object, and then execute the printname method:
x = Town("London with", "12000 K")
x.printname()
def __init__(self, town_name, town_population):
self.town_n = town_name
self.town_p = town_population
def printname(self):
print(self.town_n, self.town_p)
#Use the Town class to create an object, and then execute the printname method:
x = Town("London with", "12000 K")
x.printname()
Output: London with 12000 K
Derived or Child class
Create a class named capital_of_country, which will inherit the properties and methods from the Town class:
Example:
London, GB capital with 12000 K
London with 12000 K
# ****** Derived or Child class *********
class Town:
def __init__(self, town_name, town_population):
self.town_n = town_name
self.town_p = town_population
def printname(self):
print(self.town_n, self.town_p)
class capital_of_country(Town):
pass
y = Town("London, GB capital with", "12000 K")
y.printname()
#********* Create Base or Parent class *************
class Town:
def __init__(self, town_name, town_population):
self.town_n = town_name
self.town_p = town_population
def printname(self):
print(self.town_n, self.town_p)
#Use the Town class to create an object, and then execute the printname method:
y = Town("London with", "12000 K")
y.printname()
Output:class Town:
def __init__(self, town_name, town_population):
self.town_n = town_name
self.town_p = town_population
def printname(self):
print(self.town_n, self.town_p)
class capital_of_country(Town):
pass
y = Town("London, GB capital with", "12000 K")
y.printname()
#********* Create Base or Parent class *************
class Town:
def __init__(self, town_name, town_population):
self.town_n = town_name
self.town_p = town_population
def printname(self):
print(self.town_n, self.town_p)
#Use the Town class to create an object, and then execute the printname method:
y = Town("London with", "12000 K")
y.printname()
London, GB capital with 12000 K
London with 12000 K
python inheritance vs composition, super, override method, constructor, multiple classes, init, classes, function override, order
Python Inheritance - python
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