attempting to come up with an example of subclassing enums

gistfile1.txt

class CoinType(Enum):
   "types of coins we keep track of."
    penny = 1
    nickel = 2
    dime = 3
    quarter = 4
    dollar = 5

class DefaultCoinUsage(CoinType):
    """Represent what coin type the administration 
    interface should use on startup.

    Is stored in prefs.default_coin_type

    """

    ask_user = 6   # ask at startup and store per session
    last_used = 7  # use the user's last selection from the previous session

class CoinQuery(CoinType):
     "Represent criteria for searching among coin records."

     all = 6  # query across all coins