我试图从我的 Flask-socketio 服务器调用函数
from flask_socketio import emit
import asyncio
async def myfunc():
for i in range(10):
j = 1*3
await emit('update', {'j':j})
在我正在运行的服务器功能中
loop = asyncio.new_event_loop()
asyncio.set_event_loop(loop)
task = asyncio.gather(myfunc())
loop.run_until_complete(task)
我在循环的第一次迭代中遇到错误一次成功发出。
File "path\to\Python\Python37-32\Lib\threading.py", line 917, in _bootstrap_inner
self.run()
File "path\to\Python\Python37-32\Lib\threading.py", line 865, in run
self._target(*self._args, **self._kwargs)
File "path\to\lib\site-packages\socketio\server.py", line 636, in _handle_event_internal
r = server._trigger_event(data[0], namespace, sid, *data[1:])
File "path\to\lib\site-packages\socketio\server.py", line 665, in _trigger_event
return self.handlers[namespace][event](*args)
File "path\to\lib\site-packages\flask_socketio\__init__.py", line 280, in _handler
*args)
File "path\to\lib\site-packages\flask_socketio\__init__.py", line 694, in _handle_event
ret = handler(*args)
File "path\to\server.py", line 127, in print_message
loop.run_until_complete(task)
File "path\to\Python\Python37-32\Lib\asyncio\base_events.py", line 584, in run_until_complete
return future.result()
File "path\to\script.py", line 261, in fun
await emit('update', {'j':j})
TypeError: object NoneType can't be used in 'await' expression
我希望能够调用 myfunc() 并在 for 循环的每次迭代中向我的 socketio 客户端发出更新
await
函数上调用
non async
时,我也遇到了同样的错误。例如
def do_something():
print("Do Something")
async erroneous_function():
await do_something()
解决方案很简单,删除 await
前面的
do_something()
,因为它不是异步的。
async def disconnect(self, close_code):
pass
是正确的方法。如果没有前缀 async,每当我的客户端调用 closes() WS conn 时,我都会收到与上述相同的错误。