掌握Python中的命令设计模式

from abc import ABC, abstractmethod# Command Interfaceclass Command(ABC):    @abstractmethod    def execute(self):        pass# Receiver (the Light class)class Light:    def turn_on(self):        print("The light is ON")    def turn_off(self):        print("The light is OFF")# Concrete Command to turn the light onclass TurnOnCommand(Command):    def __init__(self, light):        self.light = light    def execute(self):        self.light.turn_on()# Concrete Command to turn the light offclass TurnOffCommand(Command):    def __init__(self, light):        self.light = light    def execute(self):        self.light.turn_off()# Invoker (the RemoteControl class)class RemoteControl:    def __init__(self):        self.command = None    def set_command(self, command):        self.command = command    def press_button(self):        if self.command:            self.command.execute()# Client Codelight = Light()                              # Create the receiverremote = RemoteControl()                     # Create the invoker# Create commands for turning the light on and offturn_on = TurnOnCommand(light)turn_off = TurnOffCommand(light)# Use the remote to turn the light ONremote.set_command(turn_on)remote.press_button()                        # Output: "The light is ON"# Use the remote to turn the light OFFremote.set_command(turn_off)remote.press_button()                        # Output: "The light is OFF"