运行时错误:事件循环正在运行

Question

调用函数时出现以下错误send_message.

Exception in thread Thread-1:
Traceback (most recent call last):
  File "/usr/lib/python3.4/threading.py", line 920, in _bootstrap_inner
    self.run()
  File "/usr/lib/python3.4/threading.py", line 868, in run
    self._target(*self._args, **self._kwargs)
  File "/home/joffe/Documents/discord/irc/ircbot.py", line 44, in get_message
    mydiscord.send_message(line[1])
  File "/home/joffe/Documents/discord/irc/mydiscord.py", line 37, in send_message
    client.loop.run_until_complete(client.send_message(SERVER,message))
  File "/usr/lib/python3.4/asyncio/base_events.py", line 331, in run_until_complete
    self.run_forever()
  File "/usr/lib/python3.4/asyncio/base_events.py", line 296, in run_forever
    raise RuntimeError('Event loop is running.')
RuntimeError: Event loop is running.

我的功能send_message接收消息并将其发送到不和谐频道.该函数是从一个在线程中运行的函数调用的.客户端对象在主线程中创建.

def send_message(message):
    print(str.encode("Message to discord: " + message))

    client.loop.run_until_complete(client.send_message(SERVER,message))

Answer 1

当我调用loop.run_until_complete已经运行的循环时,我只看到"事件循环正在运行"异常(在另一个线程中,也许？)

如果循环已在另一个线程中运行,并且您想要提交协程以执行它,请使用:

asyncio.run_coroutine_threadsafe(client.send_message(SERVER, message), client.loop)

如果你试图在循环中添加一个协同程序并且该循环在当前线程上运行,那么最好的方法可能就是await/ yield from它,但是如果你从同步函数调度它,那么你可能想要:

asyncio.ensure_future(
    client.send_message(SERVER, message),
    loop=client.loop
).add_done_callback(fn)

fn函数在哪里,其唯一参数是未来创建的未来,ensure_future并在未来完成后调用.