def invert_dict(d):
inv = dict()
for key in d:
val = d[key]
if val not in inv:
inv[val] = [key]
else:
inv[val].append(key)
return inv
lumpy = Lumpy()
lumpy.make_reference()
empty = []
hist = histogram('parrot')
inverse = invert_dict(hist)
box = Rectangle()
box.width = 100.0
box.height = 200.0
box.corner = Point()
box.corner.x = 0.0
box.corner.y = 0.0
box2 = copy.copy(box)
lumpy.object_diagram()
