为什么调度和请求库在Python中不能与这个类一起工作？

class MyClass:
    def __init__(self):
        pass

    def my_method(self):
        print("Method called!")

# 示例：使用APScheduler调度
from apscheduler.schedulers.background import BackgroundScheduler

scheduler = BackgroundScheduler()
my_instance = MyClass()
scheduler.add_job(my_instance.my_method, 'interval', seconds=10)
scheduler.start()

pip install requests==2.25.1  # 安装特定版本的requests库

import asyncio
import aiohttp

class MyClass:
    async def fetch(self, url):
        async with aiohttp.ClientSession() as session:
            async with session.get(url) as response:
                return await response.text()

# 示例：异步调度
async def main():
    my_instance = MyClass()
    result = await my_instance.fetch('https://example.com')
    print(result)

asyncio.run(main())

import threading

class MyClass:
    def __init__(self):
        self.lock = threading.Lock()

    def my_method(self):
        with self.lock:
            print("Method called!")

# 示例：使用线程安全的调度
from apscheduler.schedulers.background import BackgroundScheduler

scheduler = BackgroundScheduler()
my_instance = MyClass()
scheduler.add_job(my_instance.my_method, 'interval', seconds=10)
scheduler.start()