老师，最新版本的python asyncio中的get_event_loop方法已被列为过时方法，官方推荐用其他的方法改造。现在这个database类仍正常运行但是会出三个warning。请问老师该如何改造代码使得其满足最新的版本呢

官方信息：
Get the current event loop.
If there is no current event loop set in the current OS thread, the OS thread is main, and set_event_loop() has not yet been called, asyncio will create a new event loop and set it as the current one.
Because this function has rather complex behavior (especially when custom event loop policies are in use), using the get_running_loop() function is preferred to get_event_loop() in coroutines and callbacks.
Consider also using the asyncio.run() function instead of using lower level functions to manually create and close an event loop.
Deprecated since version 3.10: Deprecation warning is emitted if there is no running event loop. In future Python releases, this function will be an alias of get_running_loop().