what is the purpose of self in python

"SELF" in Python

The self in python represents the instance of CLASS .unlike this in c++, self is not a keyword , it is only a coding convention , often the first argument of the method is called self , you could give any name to the first argument you want

But a python user is strongly advised to stick to the convention provided . it binds the attributes with the given arguments . the use of self makes it easier to distinguish between instance attributes from local variables

Example:

class name:

    def __init__ (s2,roll,sink): # as you can see i have used s2 instead of self
        s2.roll = roll    # declaring instance variable
        s2.sink = sink

    def single(self): # and here i have used self
        print(self.roll, self.sink)

n1 = name(34,56)
n1.single()

you could declare variable within a class without using the self reference , but then those variables will be shared by all instances of that class . if you don't declare an instance variable then you cant pass unique value to each methods .


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