Python prints: (1,2,3)
Error Pop-up says: "Oops. Try again, looks like you didn't print "(1,2,3)".
Honestly? For it to give me the green pop-up and let me into the next exercise.
class Point3D(object): def __init__(self, x, y, z): self.x = x self.y = y self.z = z def __repr__(self): return "(%d,%d,%d)" % (self.x, self.y, self.z) my_point = Point3D(1,2,3) print str(my_point)