How to use self parameter to maintain state of object in Python?

When objects are instantiated, the object itself is passed into the self parameter. The Object is passed into the self parameter so that the object can keep hold of its own data.

class State(object):
    def __init__(self):
        self.field = 5.0
 
    def add(self, x):
        self.field += x
 
    def mul(self, x):
        self.field *= x
 
    def div(self, x):
        self.field /= x
 
    def sub(self, x):
        self.field -= x
 
 
s = State()
print(s.field)
 
s.add(2)         # Self is implicitly passed.
print(s.field)
 
s.mul(2)         # Self is implicitly passed.
print(s.field)
 
s.div(2)         # Self is implicitly passed.
print(s.field)
 
s.sub(2)         # Self is implicitly passed.
print(s.field)

Sample output of above program.

5.0
7.0
14.0
7.0
5.0

Python Programming

How to use self parameter to maintain state of object in Python?

Sample output of above program.