Python Inheritance

Inheritance OOP(Object-Oriented Programming) का एक हिस्सा है | Inheritance में एक से ज्या classes होते है |
Inheritance में दो प्रकार के मुख्य class देना अनिवार्य होता है |

• Base Class(Parent) : Base class को super या parent class भी कहा जाता है |
• Derived Class(Child) : Derived class को sub या child class भी कहा जाता है | Derived class ये Base class की properties या attributes को inherit करता है |

Syntax for Inheritance/Single Inheritance

class Base:
 "This is a Docstring(Optional)"
 Base_Class_Body
class Derived(Base):
 "This is a Docstring(Optional)"
 Derived_Class_Body

Example For Inheritance in Python

Example पर Fitness Class के obj इस object से Employee Class की properties को inherit किया गया है |
Source Code :

class Employee:
 "Class Employee"
    def set1(self,empid,name,salary):        
        self.empid = empid
        self.name = name
        self.salary = salary
class Fitness(Employee):
    "Class Fitness"
 def set2(self,height,weight):
        self.height = height
        self.weight = weight
    def display(self):
        print("id is",self.empid)
        print("name is",self.name)
        print("salary is",self.salary,"Rs")
        print("height is",self.height,"cm")
        print("weight is",self.weight,"Kg")

obj = Fitness()
obj.set1(1,"Rakesh",27000)
obj.set2(176,60)
obj.display()

Output :

id is 1
name is Rakesh
salary is 27000 Rs
height is 176 cm
weight is 60 Kg

issubclass() and isinstance() functions in Python

issubclass(subclass, superclass)
isinstance(object, class)

issubclass() ये function दिए हुए superclass का दिया हुआ subclass है या नही ये boolean value में return करता है |
isinstance() ये function दिए हुए class का दिया हुआ object है या नही ये boolean value में return करता है |
Source Code :

class Employee:
    pass
class Fitness(Employee):
    pass

obj1 = Fitness()
obj2 = Employee()

print(issubclass(Fitness, Employee))
print(isinstance(obj1, Fitness))
print(isinstance(obj2, Fitness))

Output :

True
True
False