Code:
class calculator():
    def __init__(self,x=0,y=0):
        self.first=x
        self.second=y
        #calculator.param=+theta
   
    def scaleparam(self,theta):
        self.theta=theta
        return self.theta

    def addition(self,theta):
        self.addition1=(self.first+self.second)*self.scaleparam(theta)
        return self.addition1
...