Python Basic example - Class - Python 3.6

#Defining Class to total of two variables
class total:
 def setvar(self,x,y):  #defining member functions to get variable from user
    self.x = int (input("enter value of x :->"))
    self.y = int (input("enter value of y :->"))

 def addvar(self): #defining member functions to add variables
        z=int(self.x+self.y)
        print(z)

sum=total()# create class instance
sum.setvar("x","y")
sum.addvar()