3.2 creating class

A class in python can be considered as a collection of functions which share some data (attributes). However, a class need not to have functions in it i.e. it can only consist of attributes.

We can define a minimal class as follows

class Insan:
    pass

A class definition consists of two parts:

• header: keyword class and name of class and then listing of other classes from which this class inherits i.e. superclasses. 3rd argument is optional.

• body: indented statements, Above we have only one statement i.e. pass.

Using classes

We can use this simple class as following

ali = Insan()
husain = Insan()

Above we have created two objects which are called instances of a class. ali and husain are instances of Insan class. If we check the type of these instances we can confirm it.

type(ali), type(husain)

(<class '__main__.Insan'>, <class '__main__.Insan'>)

shabir = husain

print(husain == shabir)

True

print(husain == ali)

False

So husain and ali are different although they are instances of same class. They are different because they are different instances of the Insan class.