阻止观察者不显示日志

class Observer:
    def update(self, message):
        print(f"Observer received message: {message}")

class Subject:
    def __init__(self):
        self._observers = []

    def add_observer(self, observer):
        self._observers.append(observer)

    def remove_observer(self, observer):
        self._observers.remove(observer)

    def notify_observers(self, message):
        for observer in self._observers:
            observer.update(message)

# 示例
subject = Subject()
observer1 = Observer()
observer2 = Observer()

subject.add_observer(observer1)
subject.add_observer(observer2)

subject.notify_observers("Hello Observers")

import logging

# 配置日志显示
logging.basicConfig(level=logging.INFO)

class Observer:
    def update(self, message):
        logging.info(f"Observer received message: {message}")

# 示例
subject = Subject()
observer1 = Observer()

subject.add_observer(observer1)

subject.notify_observers("Hello Observers")

import logging

logging.basicConfig(level=logging.DEBUG)

class Observer:
    def update(self, message):
        logging.debug(f"Observer received message: {message}")
        # 确保日志显示逻辑正确
        print(f"Observer received message: {message}")

# 示例
subject = Subject()
observer1 = Observer()

subject.add_observer(observer1)

subject.notify_observers("Hello Observers")