UnboundLocalError: local variable 'ret' referenced before assignment

[larryclean]

i want to write logics at the "disconnect".but i got this error "local variable 'ret' referenced before assignment"

@sio.on('disconnect') async def disconnect(sid): # await user.logout(sid) await sio.sleep(2) print("disconnect" + sid)

[miguelgrinberg]

Can you paste the complete stack trace of the error please?

[larryclean]

ERROR:aiohttp.server:Error handling request
Traceback (most recent call last):
  File "/Volumes/macsource/01-Project/03-Pyvirtual/aiohttp/lib/python3.5/site-packages/socketio/asyncio_server.py", line 314, in _trigger_event
    ret = await self.handlers[namespace][event](*args)
  File "/Volumes/macsource/01-Project/02-Python/yikeweiqi/rtgame/views/realtime.py", line 71, in disconnect
    await sio.sleep(2)
  File "/Volumes/macsource/01-Project/03-Pyvirtual/aiohttp/lib/python3.5/site-packages/socketio/asyncio_server.py", line 222, in sleep
    return await self.eio.sleep(seconds)
  File "/Volumes/macsource/01-Project/03-Pyvirtual/aiohttp/lib/python3.5/site-packages/engineio/asyncio_server.py", line 202, in sleep
    return await asyncio.sleep(seconds)
  File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/asyncio/tasks.py", line 524, in sleep
    return (yield from future)
  File "uvloop/future.pyx", line 230, in __iter__ (uvloop/loop.c:110600)
  File "uvloop/future.pyx", line 432, in uvloop.loop.BaseTask._fast_wakeup (uvloop/loop.c:113980)
  File "uvloop/future.pyx", line 96, in uvloop.loop.BaseFuture._result_impl (uvloop/loop.c:108829)
concurrent.futures._base.CancelledError

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/Volumes/macsource/01-Project/03-Pyvirtual/aiohttp/lib/python3.5/site-packages/aiohttp/web_server.py", line 62, in handle_request
    resp = yield from self._handler(request)
  File "/Volumes/macsource/01-Project/03-Pyvirtual/aiohttp/lib/python3.5/site-packages/aiohttp/web.py", line 270, in _handle
    resp = yield from handler(request)
  File "/Volumes/macsource/01-Project/03-Pyvirtual/aiohttp/lib/python3.5/site-packages/engineio/asyncio_server.py", line 135, in handle_request
    packets = await socket.handle_get_request(environ)
  File "/Volumes/macsource/01-Project/03-Pyvirtual/aiohttp/lib/python3.5/site-packages/engineio/asyncio_socket.py", line 72, in handle_get_request
    return await getattr(self, '_upgrade_' + transport)(environ)
  File "/Volumes/macsource/01-Project/03-Pyvirtual/aiohttp/lib/python3.5/site-packages/engineio/asyncio_socket.py", line 113, in _upgrade_websocket
    return await ws(environ)
  File "/Volumes/macsource/01-Project/03-Pyvirtual/aiohttp/lib/python3.5/site-packages/engineio/async_aiohttp.py", line 95, in __call__
    await self.handler(self)
  File "/Volumes/macsource/01-Project/03-Pyvirtual/aiohttp/lib/python3.5/site-packages/engineio/asyncio_socket.py", line 185, in _websocket_handler
    await self.close(wait=True, abort=True)
  File "/Volumes/macsource/01-Project/03-Pyvirtual/aiohttp/lib/python3.5/site-packages/engineio/asyncio_socket.py", line 95, in close
    await self.server._trigger_event('disconnect', self.sid)
  File "/Volumes/macsource/01-Project/03-Pyvirtual/aiohttp/lib/python3.5/site-packages/engineio/asyncio_server.py", line 237, in _trigger_event
    ret = await self.handlers[event](*args)
  File "/Volumes/macsource/01-Project/03-Pyvirtual/aiohttp/lib/python3.5/site-packages/socketio/asyncio_server.py", line 366, in _handle_eio_disconnect
    await self._handle_disconnect(sid, '/')
  File "/Volumes/macsource/01-Project/03-Pyvirtual/aiohttp/lib/python3.5/site-packages/socketio/asyncio_server.py", line 273, in _handle_disconnect
    await self._trigger_event('disconnect', '/', sid)
  File "/Volumes/macsource/01-Project/03-Pyvirtual/aiohttp/lib/python3.5/site-packages/socketio/asyncio_server.py", line 319, in _trigger_event
    return ret
UnboundLocalError: local variable 'ret' referenced before assignment

[miguelgrinberg]

Oh, wow, that is my bug. I'll have a fix up in a bit. Thanks!

[larryclean]

No need to thank, you are too polite