self.x = x
self.y = y
self.z = z
return "(%d,%d,%d)" % (self.x, self.y, self.z)
my_point = Point3D(1,2,3)
this is what I have coded but it told me that " it looks like you didn't print "(1,2,3)". "
what's wrong with my code?hope you can help me ,thx