In this Python oops program, we will create a class with multilevel inheritance in Python. The program showcases inheritance hierarchy in Python. The ChildClass inherits methods from both ParentClass and GrandparentClass, and an object created from the child class can access and invoke methods from all the ancestor classes as well as its own methods.
Create a class with multilevel inheritance
Steps to solve the program
- The GrandparentClass is a base class or parent class that defines a method called grandparent_method. This method prints “Grandparent method”.
- The ParentClass is a derived class or child class that inherits from GrandparentClass. It also defines its own method called parent_method, which prints “Parent method”.
- The ChildClass is another derived class or child class that inherits from ParentClass. It defines its own method called child_method, which prints “Child method”.
- An object obj is created using the ChildClass. Since ChildClass inherits from ParentClass, and ParentClass inherits from GrandparentClass, the object obj has access to the methods defined in all three classes.
- The obj.grandparent_method() call invokes the grandparent_method inherited from GrandparentClass, which prints “Grandparent method”.
- The obj.parent_method() call invokes the parent_method inherited from ParentClass, which prints “Parent method”.
- The obj.child_method() call invokes the child_method defined in the ChildClass, which prints “Child method”.
class GrandparentClass:
def grandparent_method(self):
print("Grandparent method")
class ParentClass(GrandparentClass):
def parent_method(self):
print("Parent method")
class ChildClass(ParentClass):
def child_method(self):
print("Child method")
# Create an object of the child class
obj = ChildClass()
obj.grandparent_method()
obj.parent_method()
obj.child_method()
Output:
Grandparent method
Parent method
Child method