calculater.py

class cal():
    def __init__(self,a,b):
        self.a = a
        self.b = b
    def add(self):
        return self.a+self.b
    def sub(self):
        return self.a-self.b
    def multiply(self):
        return self.a*self.b
    def multiply(self):
        return self.a/self.b 


a = int(input('Enter First number :'))
b = int(input('Enter Second number :'))
obj=cal(a,b)
while True:
    def menu():
        x = ('1.Add \n2.Sub \n3.multiply \n4.divide')
        print(x)
    menu()
    choice = int(input('Please select one of the following: '))    
    if choice == 1:
        print('Result: ',obj.add())
    elif choice == 2:
        print('Result: ',obj.sub())
    elif choice == 3:
        print('Result: ',obj.multiply())
    elif choice == 4:
        print('Result: ',obj.divide())
    elif choice == 0:
        print("Again try one of than")
        break