Chapter 14, Problem 3SA

Class:

• Python is an object oriented programming language which means that the code has to be implemented using classes and objects.
• It means bundling of data and functionality together.
• If a class is created then a new type of object has to be created, allowing new instance of the class.
• All the members of a class are public.
• All the member functions of a class are virtual.

Example for class:

#define a class

class Example_Class:

#now define a method inside the class

    def my_method(self):

#print statement

print ("I am inside the method of class")

Instance of a class:

• An object is an instance of a class.
• It is a software entity.
• It contains both data and procedures.
• The data in an object is object’s data attributes.
• The object’s data attributes are the variables which is a reference to a data.
• The object performs a procedure which is known as methods.

Real time example for class and instance of a class:

In a real world, there are many individual objects that are of same kind.

• There may be thousands of bikes, all of same make and model.
• Each of these bikes was built using same set of blueprints.
• As a result they contain same components.
• Here the bike is the instance of a class
• Therefore a class is the blueprint for an object from which the individual objects were created...