CLASS OBJECT AND INHERITANCE IN PYTHON
- 1. CLASS OBJECT & INHERITANCE I N P Y T H O N
- 2. CONTENTS Class Object Inheritance
- 3. WHAT ARE CLASSES AND OBJECTS IN PYTHON? Python is an object oriented programming language. Unlike procedure oriented programming, where the main emphasis is on functions, object oriented programming stress on objects. Object is simply a collection of data (variables) and methods (functions) that act on those data. And, class is a blueprint for the object. We can think of class as a sketch (prototype) of a house. It contains all the details about the floors, doors, windows etc. Based on these descriptions we build the house. House is the object. As, many houses can be made from a description, we can create many objects from a class. An object is also called an instance of a class and the process of creating this object is called instantiation.
- 4. DEFINING A CLASS IN PYTHON Like function definitions begin with the keyword def, in Python, we define a class using the keyword class. Here is a simple class definition.
- 5. CREATING AN OBJECT IN PYTHON We saw that the class object could be used to access different attributes. It can also be used to create new object instances (instantiation) of that class. The procedure to create an object is similar to a function call.
- 6. EXAMPLE
- 8. WHAT IS INHERITANCE? Inheritance is a powerful feature in object oriented programming. It refers to defining a new class with little or no modification to an existing class. The new class is called derived (or child) class and the one from which it inherits is called the base (or parent) class.
- 10. TYPES OF INHERITANCE Single Inheritance Multiple Inheritance Multilevel Inheritance Hybrid Inheritance Hierarchical Inheritance
- 11. SINGLE INHERITANCE In which there is one base class and one derived class
- 12. MULTIPLE INHERITANCE Multiple inheritance is possible in python A class can be derived from more then one base classes. The syntax for multiple inheritance is similar to single inheritance Here is an example of multiple inheritance
- 14. MULTILEVEL INHERITANCE Multilevel inheritance is also possible in Python like other Object Oriented programming languages. We can inherit a derived class from another derived class, this process is known as multilevel inheritance. In Python, multilevel inheritance can be done at any depth.
- 18. HIERARCHICAL INHERITANCE In which there is single base class and multiple derived class
- 20. THANK YOU