RuntimeError: no running event loop

[leaf188]

The following error message appears when you run BAC0.lite() ` root@vm01:~# python Python 3.12.0 (main, Oct 21 2023, 17:42:12) [GCC 11.4.0] on linux Type "help", "copyright", "credits" or "license" for more information.

import BAC0 bacnet=BAC0.lite() [09/11/24 07:54:41] INFO 2024-09-11 07:54:41,724 - INFO | Starting Asynchronous BAC0 version 2024.09.10 (Lite) notes.py:267 INFO 2024-09-11 07:54:41,728 - INFO | Using bacpypes3 version 0.0.98 notes.py:267 INFO 2024-09-11 07:54:41,729 - INFO | Use BAC0.log_level to adjust verbosity of the app. notes.py:267 INFO 2024-09-11 07:54:41,730 - INFO | Ex. BAC0.log_level('silence') or BAC0.log_level('error') notes.py:267 Traceback (most recent call last): File "", line 1, in File "/usr/local/lib/python3.12/dist-packages/BAC0/scripts/Lite.py", line 141, in init self._ping_task.start() File "/usr/local/lib/python3.12/dist-packages/BAC0/tasks/TaskManager.py", line 143, in start self.aio_task = asyncio.create_task(self.execute(), name=f"aio{self.name}") ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/usr/lib/python3.12/asyncio/tasks.py", line 407, in create_task loop = events.get_running_loop() ^^^^^^^^^^^^^^^^^^^^^^^^^ RuntimeError: no running event loop `

[ChristianTremblay]

You must run

python -m asyncio

This way, an event loop will be available.

Then

import BAC0
bacnet = BAC0.start()

You can also play with a Jupyter Notebook. It will work

[haithngn]

I am facing with the same issue on Mac M1, python 3.12.6 (via pyenv)

also tried,

python -m asyncio
asyncio REPL 3.12.6 (main, Sep  6 2024, 19:03:47) [Clang 15.0.0 (clang-1500.3.9.4)] on darwin
Use "await" directly instead of "asyncio.run()".
Type "help", "copyright", "credits" or "license" for more information.
>>> import asyncio
>>> import BAC0
Traceback (most recent call last):
  File "/opt/homebrew/Cellar/python@3.12/3.12.6/Frameworks/Python.framework/Versions/3.12/lib/python3.12/concurrent/futures/_base.py", line 456, in result
    return self.__get_result()
           ^^^^^^^^^^^^^^^^^^^
  File "/opt/homebrew/Cellar/python@3.12/3.12.6/Frameworks/Python.framework/Versions/3.12/lib/python3.12/concurrent/futures/_base.py", line 401, in __get_result
    raise self._exception
  File "/opt/homebrew/Cellar/python@3.12/3.12.6/Frameworks/Python.framework/Versions/3.12/lib/python3.12/asyncio/__main__.py", line 33, in callback
    coro = func()
           ^^^^^^
  File "<console>", line 1, in <module>
ModuleNotFoundError: No module named 'BAC0'
>>> 

@ChristianTremblay can you please have a look, do I need a Linux or Windows machine?

[haithngn]

update, I have switched to python 3.10.15, now

>>> import asyncio
>>> import BAC0
>>> bacnet = BAC0.start()

it says

2024-09-23 17:10:49,560 - INFO    | Starting Asynchronous BAC0 version 2024.09.10 (Lite)
2024-09-23 17:10:49,560 - INFO    | Using bacpypes3 version 0.0.98
2024-09-23 17:10:49,560 - INFO    | Use BAC0.log_level to adjust verbosity of the app.
2024-09-23 17:10:49,560 - INFO    | Ex. BAC0.log_level('silence') or BAC0.log_level('error')
Unsupported platform
2024-09-23 17:10:49,607 - INFO    | Installing recurring task Ping Task (id:4317581888)

.pyenv/versions/3.10.15/lib/python3.10/ipaddress.py", line 472, in _report_invalid_netmask
    raise NetmaskValueError(msg) from None
ipaddress.NetmaskValueError: 'None' is not a valid netmask

the I tried to run the code from PyCharm, that console said

loop = events.get_running_loop()
RuntimeError: no running event loop
sys:1: RuntimeWarning: coroutine 'Task.execute' was never awaited

finally, I found the ip/mask of the macbook then start on them, then it seems BAC0 is now working, but this still happens in PyCharm IDE

loop = events.get_running_loop()
RuntimeError: no running event loop
sys:1: RuntimeWarning: coroutine 'Task.execute' was never awaited

I will try to read and write data via BAC0 into a YABE device then update the result into this ticket.

2024-09-23 17:17:01,292 - INFO    | Using default JSON configuration file
2024-09-23 17:17:01,310 - INFO    | Registered as BACnet/IP App | mode normal
2024-09-23 17:17:01,312 - INFO    | Device instance (id) : 3056656
>>> 2024-09-23 17:17:01,312 - INFO    | Installing recurring task Ping Task (id:4331449616)

[haithngn]

hi guys, I have succeed read data from a BACnet device (Yabe), confirm BAC0 works fine.

@leaf188 , you have to place BAC0 instance somewhere that you keep it alive, for now, I have to put in into Flask middleware (for workaround).

thank you @ChristianTremblay, this issue can be closed I think. and we can have a more detail example the perfect for developer who is not much familiar with Python.

[haithngn]

p/s: the legacy versions 23.07.03 is still good, there is some news in asyncio version need to be learned before using.