1 class C: 2 def __init__(self, x, y, z): 3 self.x = x 4 self.y = y 5 self.z = z 6 7 def c(self): 8 return self.x 9 10 c = C(1, 2, 3) 11 print c.c() # 1 12 print C.c() # bad