事件的订阅与发布

事件枚举

from enum import Enum

class EventTypes(Enum):
    Event1="event1"
    Event2 = "event2"
    ...

事件发布

全局单例

class EventPublisher:
    def __init__(self):
        self._subscribers = []
 
    def add_subscriber(self, subscriber):
        self._subscribers.append(subscriber)
 
    def remove_subscriber(self, subscriber):
        self._subscribers.remove(subscriber)
 
    def publish_event(self, event_type, event_data=None):
        for subscriber in self._subscribers:
            subscriber.handle_event(event_type, event_data)

event_publisher = EventPublisher()

事件订阅

抽象父类

from abc import ABC, abstractmethod

class EventSubscriber(ABC):
    @abstractmethod
    def handle_event(self, event_type, event_data=None):
        ...

具体子类

from event_subscriber import EventSubscriber
from event_types import EventTypes

class App(EventSubscriber):
    def __init__(self) -> None:
        event_publisher.add_subscriber(self)
        ...
    def handle_event(self, event_type, event_data=None):
        if event_type == EventTypes.Event1:
            ...
        if event_type == EventTypes.Event2:
            ...