What is it with this OOPs Class : A blueprint/template Object : The physical instance
Python Object Oriented Programming
Objects in Python Samsung Motorola Specific instances of Mobile data type Specific instances of integer data type Apple
Class in Python Class is a user- defined data- type Mobile float bool str Int
Class Classes Class is a template/blue- print for real- world entities Properties Behavior Color Cost Battery Life Make Calls Watch Videos Play Games
OOPS 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. I dentity: It gives a unique name to an object. S tate: It reflects the properties of an object. B ehavior: It reflects the response of an object with other objects.
Characteristics of OOPs OOPs uses a bottom-up approach. The p rogram is divided into objects. OOPs is more secure than procedural languages .
Creating the first Class Creating the ‘Phone’ class Instantiating the ‘p1’ object Invoking methods through object Main Memory P1(Phone)
Creating a class and 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 . P1= Employee(Kiran,34,22000,Male) P2= Employee(Sruthi,37,34000,Female) Kiran 34 22000 Male Sruthi 37 34000 Female
Instantiating Object Instantiating the ‘e1’ o bject Invoking the ‘employee_details’ method
Inheritance in Python With inheritance one class can derive the properties of another class Man inheriting features from his father
Inheritance Example Creating the base class Instantiating the object for base class
Inheritance Example Creating the child class Instantiating the object for child class Invoking the child class method
Over- riding init method Over- riding init method Invoking show_details() method from parent class Invoking show_car_details() method from child class Super: super() is a built-in function used in object-oriented programming to give you access to methods and properties of a parent or sibling class. super() is a built-in function used in object-oriented programming to give you access to methods and properties of a parent or sibling class.
Types of Inheritance Single Inheritance Multiple Inheritance Multi- level Inheritance Hybrid Inheritance
Multiple Inheritance Child Parent 1 Parent 2 In multiple inheritance, the child inherits from more than 1 parent class
Multiple Inheritance in Python Parent Class One Parent Class Two Child Class
Multiple Inheritance in Python Instantiating object of child class Invoking methods
Multi- Level Inheritance Parent In multi- level Inheritance, we have Parent, child, grand- child relationship Child Grand- Child
Multi- Level Inheritance in Python Parent Class Child Class Grand- Child Class
Multi- Level Inheritance in Python Instantiating object of GrandChild class Invoking class methods
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 sta te of a structured data object inside a class, preventing unauthorized access to an unauthorized person. Polymorphism is a Greek word that means many shape d . Polymorphism is the ability of a message to be displayed in more than one form.