Python asyncio:无法创建新的事件循环
我正在Fedora26工作站上使用Python 3.6.2 下面是一些剪贴簿代码,演示了我的问题: 编辑:将Sam Hartman的建议添加到代码中Python asyncio:无法创建新的事件循环,python,python-asyncio,autobahn,Python,Python Asyncio,Autobahn,我正在Fedora26工作站上使用Python 3.6.2 下面是一些剪贴簿代码,演示了我的问题: 编辑:将Sam Hartman的建议添加到代码中 import asyncio, json from autobahn.asyncio.websocket import WebSocketClientProtocol, WebSocketClientFactory class MyClientProtocol(WebSocketClientProtocol): def onConnec
import asyncio, json
from autobahn.asyncio.websocket import WebSocketClientProtocol, WebSocketClientFactory
class MyClientProtocol(WebSocketClientProtocol):
def onConnect(self, response):
print(response.peer)
def onOpen(self):
print("open")
self.sendMessage(json.dumps({'command': 'subscribe', 'channel': "1010"}).encode("utf8"))
def onMessage(self, payload, isBinary):
print("message")
print(json.loads(payload))
factory1 = WebSocketClientFactory("wss://api2.poloniex.com:443")
factory1.protocol = MyClientProtocol
loop1 = asyncio.get_event_loop()
loop1.run_until_complete(loop1.create_connection(factory1, "api2.poloniex.com", 443, ssl=True))
try:
loop1.run_forever()
except KeyboardInterrupt:
pass
loop1.close()
asyncio.set_event_loop(asyncio.new_event_loop())
factory2 = WebSocketClientFactory("wss://api2.poloniex.com:443")
factory2.protocol = MyClientProtocol
loop2 = asyncio.get_event_loop()
loop2.run_until_complete(loop2.create_connection(factory2, "api2.poloniex.com", 443, ssl=True))
try:
loop2.run_forever()
except KeyboardInterrupt:
pass
loop2.close()
关闭初始asyncio事件循环、创建另一个并将其设置为全局事件循环后,尝试使用新的事件循环会产生以下错误:
Fatal write error on socket transport
protocol: <asyncio.sslproto.SSLProtocol object at 0x7f8a84ed4748>
transport: <_SelectorSocketTransport fd=6>
Traceback (most recent call last):
File "/usr/lib64/python3.6/asyncio/selector_events.py", line 762, in write
n = self._sock.send(data)
OSError: [Errno 9] Bad file descriptor
Fatal error on SSL transport
protocol: <asyncio.sslproto.SSLProtocol object at 0x7f8a84ed4748>
transport: <_SelectorSocketTransport closing fd=6>
Traceback (most recent call last):
File "/usr/lib64/python3.6/asyncio/selector_events.py", line 762, in write
n = self._sock.send(data)
OSError: [Errno 9] Bad file descriptor
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/usr/lib64/python3.6/asyncio/sslproto.py", line 648, in _process_write_backlog
self._transport.write(chunk)
File "/usr/lib64/python3.6/asyncio/selector_events.py", line 766, in write
self._fatal_error(exc, 'Fatal write error on socket transport')
File "/usr/lib64/python3.6/asyncio/selector_events.py", line 646, in _fatal_error
self._force_close(exc)
File "/usr/lib64/python3.6/asyncio/selector_events.py", line 658, in _force_close
self._loop.call_soon(self._call_connection_lost, exc)
File "/usr/lib64/python3.6/asyncio/base_events.py", line 574, in call_soon
self._check_closed()
File "/usr/lib64/python3.6/asyncio/base_events.py", line 357, in _check_closed
raise RuntimeError('Event loop is closed')
RuntimeError: Event loop is closed
Exception in callback _SelectorSocketTransport._read_ready()
handle: <Handle _SelectorSocketTransport._read_ready()>
Traceback (most recent call last):
File "/usr/lib/python3.6/site-packages/txaio/_common.py", line 63, in call_later
self._buckets[real_time][1].append(call)
KeyError: 412835000
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/usr/lib64/python3.6/asyncio/events.py", line 127, in _run
self._callback(*self._args)
File "/usr/lib64/python3.6/asyncio/selector_events.py", line 731, in _read_ready
self._protocol.data_received(data)
File "/usr/lib64/python3.6/asyncio/sslproto.py", line 503, in data_received
ssldata, appdata = self._sslpipe.feed_ssldata(data)
File "/usr/lib64/python3.6/asyncio/sslproto.py", line 204, in feed_ssldata
self._handshake_cb(None)
File "/usr/lib64/python3.6/asyncio/sslproto.py", line 619, in _on_handshake_complete
self._app_protocol.connection_made(self._app_transport)
File "/usr/lib/python3.6/site-packages/autobahn/asyncio/websocket.py", line 97, in connection_made
self._connectionMade()
File "/usr/lib/python3.6/site-packages/autobahn/websocket/protocol.py", line 3340, in _connectionMade
WebSocketProtocol._connectionMade(self)
File "/usr/lib/python3.6/site-packages/autobahn/websocket/protocol.py", line 1055, in _connectionMade
self.onOpenHandshakeTimeout,
File "/usr/lib/python3.6/site-packages/txaio/_common.py", line 72, in call_later
self._notify_bucket, real_time,
File "/usr/lib/python3.6/site-packages/txaio/aio.py", line 382, in call_later
return self._config.loop.call_later(delay, real_call)
File "/usr/lib64/python3.6/asyncio/base_events.py", line 543, in call_later
timer = self.call_at(self.time() + delay, callback, *args)
File "/usr/lib64/python3.6/asyncio/base_events.py", line 553, in call_at
self._check_closed()
File "/usr/lib64/python3.6/asyncio/base_events.py", line 357, in _check_closed
raise RuntimeError('Event loop is closed')
RuntimeError: Event loop is closed
所以我显然做错了什么。有人能看到缺少的东西吗?我很有信心,您的工厂对象正在维护对旧事件循环的引用,可能它是从
asyncio.get\u event\u loop
获得的。Asyncio使用者不善于获取对循环的隐藏引用
我的建议是在关闭循环后重建web套接字工厂您是否尝试过运行
loop.stop()
而不是close()
?事件循环没有在我调用loop.close()
的位置运行,因此这将是不可行的。谢谢Sam。我尝试过重建工厂,即使对第一个和第二个工厂/循环使用了不同的变量名,但我仍然会收到相同的错误(OSError:[Errno 9]错误的文件描述符
,RuntimeError:Event loop is closed
,KeyError:15068000
)。这就好像set\u event\u循环
调用根本不起作用。您认为我应该将此报告为bug吗?您可以在get\u event\u循环返回您设置的内容之后,检查set\u event\u循环是否正在使用断言。它几乎肯定会在某个地方挂起引用,可能在您的websocket实现中。我会问高速公路上的人。感谢Sam.Upstream bug report,对于感兴趣的人:
loop = asyncio.new_event_loop()
asyncio.set_event_loop(loop)