每个python进程的Asyncio事件循环(aioprocessing,多个事件循环)

时间:2015-04-17 15:36:40

标签: python python-asyncio

我有两个过程;主进程和子进程。主进程正在运行asyncio事件循环,并启动子进程。我想在子进程中启动另一个asyncio事件循环。我正在使用aioprocessing模块启动子流程。

子流程功能是:

def subprocess_code():
     loop = asyncio.get_event_loop()
     @asyncio.coroutine
     def f():
        for i in range(10):
            print(i)
            yield from asyncio.sleep(1)
     loop.run_until_complete(f())

但是我收到了一个错误:

    loop.run_until_complete(f())
  File "/usr/lib/python3.4/asyncio/base_events.py", line 271, in run_until_complete
    self.run_forever()
  File "/usr/lib/python3.4/asyncio/base_events.py", line 239, in run_forever
    raise RuntimeError('Event loop is running.')
RuntimeError: Event loop is running.

是否可以在子进程中启动新的或重新启动现有的asyncio事件循环?如果是这样,怎么样?

1 个答案:

答案 0 :(得分:16)

对不起打扰! 我找到了解决方案!

policy = asyncio.get_event_loop_policy()
policy.set_event_loop(policy.new_event_loop())
loop = asyncio.get_event_loop()

把这段代码用asyncio事件循环从进程启动的子进程内启动新的asycnio事件循环