#49 Python Tutorial for Beginners | Class and Object

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In this lecture we will learn:
– Class and object in Python
– How are a class and an object created?
– Syntax for creating a class
– Syntax for creating an object
– How to call a method through an object?
– What is the type of an object?

#1
– Class is a blueprint to create objects.
– Integer, Float, String, etc., are in-built types in Python.
– To create our type like a computer, we have to create our own class for it.
– To use the type that you have created, you need to define a class for it.
– A class can be defined by using the class keyword and every class must have a name to it.

The syntax for creating a class:-
class class_name:
methods():
statements
variables

– A class consists of two things:
1. Attributes – Variables
2. Behaviour – Methods (Functions)

#2
– An object of a class can be defined by a variable and assigned its value with the type of the class.
– A class can have multiple objects.

Syntax of creating an object:-
object variable = class_name()

#3
– type() return the type of a value that is present inside the variable.
– If we will return the type of an object, then it will print the class name. It means an object belongs to a type of particular class.
– String, integer, etc are also object that belongs to some in-build class like str and int respectively.

#4
– We can call any method from a class.
– The behaviour of every object will be different from each other so need to define for which object, you are calling a method.
– So, we need to pass an object in it as a parameter at the time of calling a method.
The syntax for calling a method:-
class_name.method_name(object variable)

– We pass an object to a method as an argument that will go into the self.
– Self is the object that you are passing in a method.
– We can also call a method in another way:
object_variable.method_name()

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