OOP concepts -in-Python programming language
- 1. Python Object Oriented Programming Ms Smriti Sharma
- 2. OOP Object-oriented programming (OOP) involves programming using objects. An object represents an entity in the real-world that can be distinctly identified. An object consists of identity, state, and behavior. • Identity: It gives a unique name to an object. • State: It reflects the properties of an object. • Behavior: It reflects the response of an object with other objects.
- 3. Characteristics of OOPs • OOPs uses a bottom-up approach. • The program is divided into objects. • OOPs uses access modifiers. • OOPs is more secure than procedural languages. • Objects can move freely within member functions.
- 4. Classes Class is a template/blue-print for real-world entities Properties Behavior • Color • Cost • Battery Life • Make Calls • Watch Videos • Play Games
- 5. Class in Python Class is a user-defined data-type Mobile int float bool str
- 6. Attributes and Methods color cost Play Game Make Call Attributes Methods Methods are functions defined inside a class. They are invoked by objects to perform actions on other objects. Attributes are defined within a class and outside any method. Attributes define the characteristics of any object.
- 7. Objects Objects are specific instances of a class Apple Samsung Motorola
- 8. Objects in Python Apple Samsung Motorola a = 10 b = 20 c = 30 Specific instances of Mobile data type Specific instances of integer data type
- 9. Creating the first Class Creating the ‘Phone’ class Instantiating the ‘p1’ object Invoking methods through object
- 10. Adding parameters to the class Setting and Returning the attribute values
- 11. Creating a class with Constructor init method acts as the constructor __init__ is a method that is automatically called when memory is allocated to a new object. For invoking in build parameter with object , self is used .
- 12. Instantiating Object Instantiating the ‘e1’ object Invoking the ‘employee_details’ method
- 13. Inheritance in Python With inheritance one class can derive the properties of another class Man inheriting features from his father
- 14. Inheritance Example Creating the base class Instantiating the object for base class
- 15. Inheritance Example Creating the child class Instantiating the object for child class Invoking the child class method
- 16. Over-riding init method Over-riding init method Invoking show_details() method from parent class Invoking show_car_details() method from child class
- 17. Types of Inheritance Single Inheritance Multiple Inheritance Multi-level Inheritance Hybrid Inheritance
- 18. Multiple Inheritance Child Parent 1 Parent 2 In multiple inheritance, the child inherits from more than 1 parent class
- 19. Multiple Inheritance in Python Parent Class One Parent Class Two Child Class
- 20. Multiple Inheritance in Python Instantiating object of child class Invoking methods
- 21. Multi-Level Inheritance Parent In multi-level Inheritance, we have Parent, child, grand-child relationship Child Grand-Child
- 22. Multi-Level Inheritance in Python Parent Class Child Class Grand-Child Class
- 23. Multi-Level Inheritance in Python Instantiating object of GrandChild class Invoking class methods
- 24. Definitions : Abstraction is the property by virtue of which only the essential details are displayed to the user. Encapsulation is a process of binding data members and member functions into a single unit. Encapsulation hides the state of a structured data object inside a class, preventing unauthorized access to an unauthorized person. Polymorphism is a Greek word that means many shaped. Polymorphism is the ability of a message to be displayed in more than one form.