What is the reason for getting the "Event loop is closed" exception when using aiomysql?

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The "Event loop is closed" exception is typically raised when you attempt to use an async function or coroutine after the event loop has already been closed. This can happen if you try to use an asyncio library such as aiomysql after closing the event loop, or if you use it outside of a running event loop.

To avoid this error, make sure that the event loop is running when you use aiomysql and don't close the loop until you are done with all async operations. You can also use context managers, such as "async with," to handle closing the connection and releasing resources automatically.