Page 239 - thinkpython

218 Appendix C. Lumpy

Here’s a more complex example using my solution to Exercise 18.6. You can download
the code from http://thinkpython.com/code/lumpy_demo8.py ; you will also need http:
//thinkpython.com/code/PokerHand.py .
from swampy.Lumpy import Lumpy

from PokerHand import *

lumpy = Lumpy()
lumpy.make_reference()

deck = Deck()
hand = PokerHand()
deck.move_cards(hand, 7)

lumpy.class_diagram()
Figure C.8 shows the result. PokerHand inherits from Hand , which inherits from Deck . Both
Deck and PokerHand have Cards.

This diagram does not show that Hand also has cards, because in the program there are no
instances of Hand. This example demonstrates a limitation of Lumpy; it only knows about
the attributes and HAS-A relationships of objects that are instantiated.