Method Chaining example in python

Method Chaining in python.py

class Calculator():
    
    def __init__(self, variable):
        self.variable = variable      
    
    def add(self, adition):
        total = self.variable + adition
        print(total)
        print ("Calculator.add() function called")
        self.variable = total
        return self
        
    def sub(self, subtraction):
        total = self.variable - subtraction
        print(total) 
        print ("Calculator.sub() function called")
        self.variable = total
        return self
    
    def mul(self, multiplication):
        total = self.variable * multiplication
        print(total)
        print ("Calculator.mul() function called")
        self.variable = total
        return self
        
    def div(self, division):
        total = self.variable / division
        print(total)
        print ("Calculator.div() function called")
        self.variable = total
        return self

a = 10
cal = Calculator(a)
cal = cal.add(6).sub(10).mul(2).div(3)