Assignment 10

Problems

  1. Think about how you would redesign the three hazard types from last week to use inheritance. What would the parent class be? How would the code in the three hazards change? How would the code change when you initiate the hazards or in the main loop? Write the parent class and modify the hazards from the game to inherit from it. Show the places if any that would need to change when you create or interact with hazards. In the comment at the top tell me if your design changed as you implemented the refactoring, and tell me if you think there is an advantage to the new implementation. If you did not complete the assignment you can work with the code provided in the slides or on the website.

  2. The class CoinJar represents a jar of Canadian coins. Write the necessary code so this program will run correctly.

    tims = CoinJar(pennies=3, quarters=2, loonies=1,toonies=0)
mollys = CoinJar(pennies=48, nickels=12, dimes=7, quarters=14)
print(tims.value()) # Displays 1.53
print(mollys.value()) # Displays 5.28
print(tims.dimes) # Displays 0.
print(tims[0]) # Displays 0.
print(mollys.quarters) # Displays 14.
print(mollys[3]) # Displays 7.
if tims > mollys:
    print('Tim is richer than Molly.')
else:
    print('Molly is at least as rich as Tim.')
# ^ Displays: Molly is at least as rich as Tim.
tims = tims + mollys
print(tims) # Fancy display of your design.

    Hint: Since the order of the parameters varies between the two constructor calls in lines 1 and 2 we can tell that named parameters are being used.

  3. The file WumpusAdjMatrixMap.py contains an alternative representation of a wumpus cave system (one based on an adjacency matrix* rather than the list of lists of tunnels we have been using) and stubs for two functions: tunnels_from and tunnels_to. Write the bodies of these functions so they will work as the docstrings describe. The docstrings contain one test of each function, but these are meant to be illustrative rather than exhaustive.

    Note that you don't have to integrate this representation into your earlier Hunt the Wumpus program. This is a stand alone problem.

    Hint: You might want to peek ahead at Module 12 to see how to activate the tests in the docstrings.

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