Simple python class calc

class Kalkulator:
def __init__(self,x,y):
self.x = x
self.y = y

def addXY(self):
print("suma: ",(self.x + self.y))

def subXY(self):
print("roznica: ",(self.x - self.y))

def mulXY(self):
print("mnozenie: ",(self.x * self.y))

def divXY(self):
if (self.y == 0):
print "div by zero"
else:
print("dzielenie: ",(self.x / self.y))

def line():
print 50*"-"

def Main():
a = int(raw_input("enter a: "))
b = int(raw_input("enter b: "))
line()

p1 = Kalkulator(a,b)
p1.addXY()
p1.subXY()
p1.mulXY()
p1.divXY()


if __name__ == '__main__':
Main()