python - "Asyncio Event Loop is Closed"获取循环时

Question

当尝试运行文档中给出的 asyncio hello world 代码示例时:

import asyncio

async def hello_world():
    print("Hello World!")

loop = asyncio.get_event_loop()
# Blocking call which returns when the hello_world() coroutine is done
loop.run_until_complete(hello_world())
loop.close()

我得到错误:

RuntimeError: Event loop is closed

我正在使用 python 3.5.3。

Answer 1

在 Windows 上似乎是 EventLoopPolicy 的问题，使用此代码段解决它:

asyncio.set_event_loop_policy(asyncio.WindowsSelectorEventLoopPolicy())
asyncio.run(main())