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OOP concepts -in-Python programming language
- 1. Python Object OrientedProgramming 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. โข Identity: It gives a unique name to an object. โข State: It reflects the properties of an object. โข Behavior: It reflects the response of an object with other objects.
- 3. Characteristics of OOPs โขOOPs uses a bottom-up approach. โข The program is divided into objects. โข OOPs uses access modifiers. โข OOPs is more secure than procedural languages. โข Objects can move freely within member functions.
- 4. Classes Class is atemplate/blue-print for real-world entities Properties Behavior โข Color โข Cost โข Battery Life โข Make Calls โข Watch Videos โข Play Games
- 5. Class in Python Classis a user-defined data-type Mobile int float bool str
- 6. Attributes and Methods color cost PlayGame 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 specificinstances of a class Apple Samsung Motorola
- 8. Objects in Python AppleSamsung Motorola a = 10 b = 20 c = 30 Specific instances of Mobile data type Specific instances of integer data type
- 9. Creating the firstClass Creating the โPhoneโ class Instantiating the โp1โ object Invoking methods through object
- 10. Adding parameters tothe class Setting and Returning the attribute values
- 11. Creating a classwith 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 theโe1โ object Invoking the โemployee_detailsโ method
- 13. Inheritance in Python Withinheritance one class can derive the properties of another class Man inheriting features from his father
- 14. Inheritance Example Creating thebase class Instantiating the object for base class
- 15. Inheritance Example Creating thechild class Instantiating the object for child class Invoking the child class method
- 16. Over-riding init method Over-ridinginit method Invoking show_details() method from parent class Invoking show_car_details() method from child class
- 17. Types of Inheritance SingleInheritance Multiple Inheritance Multi-level Inheritance Hybrid Inheritance
- 18. Multiple Inheritance Child Parent 1Parent 2 In multiple inheritance, the child inherits from more than 1 parent class
- 19. Multiple Inheritance inPython Parent Class One Parent Class Two Child Class
- 20. Multiple Inheritance inPython Instantiating object of child class Invoking methods
- 21. Multi-Level Inheritance Parent In multi-levelInheritance, we have Parent, child, grand-child relationship Child Grand-Child
- 22. Multi-Level Inheritance inPython Parent Class Child Class Grand-Child Class
- 23. Multi-Level Inheritance inPython Instantiating object of GrandChild class Invoking class methods
- 24. Definitions : Abstraction isthe 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.