Python object-oriented programming--some class definitions (miscellaneous)

First, Abstractmethod

• Subclasses must all implement the Abstractmethod method of overriding the parent class
• Non-Abstractmethod methods can be overridden without implementation
• A class with a Abstractmethod method cannot be instantiated

  From ABC import Abstractmethod, Abcmeta

1 classBettingstrategy (metaclass=Abcmeta):2 3 @abstractmethod4     defbet (self):5         Print('0')6 7     defRecord_win (self):8         Print('win')9 Ten     defRecord_loss (self): One         Print('Loss') A  -  - classBet (bettingstrategy): the     defbet (self): -         Print('1')

Extension: ABC module

Second, Staticmethod: static function

An object can be called without instantiating a function

1 classHand4:2     def __init__(Self, Dealer_card, *cards):3Self.dealer_card =Dealer_card4Self.cards =Cards5 6 @staticmethod7     defFreeze (Other):8Hand = Hand4 (Other.dealer_card, *other.cards)9         returnHandTen  One @staticmethod A     defSplit (Other, card0, card1): -Hand0 =Hand4 (Other.dealer_card, other.cards[0], card0) -Hand1 = Hand4 (Other.dealer_card, other.cards[1], Card1) the         returnhand0, Hand1 -  -     def __str__(self): -         return ','. Join (Map (str, self.cards))

1 h41 = Hand4 (Deck3.pop (), Deck3.pop (), Deck3.pop ())2     s1, s2 = hand4.split (H41, Deck3.pop (), Deck3.pop ())3     s3 = Hand4.freeze (H41)

called

Python object-oriented programming--some class definitions (miscellaneous)