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PythonMonkey cannot find a running Python event-loop to make asynchronous calls. #469
Description
Issue type
Bug
How did you install PythonMonkey?
Installed from pip
OS platform and distribution
MacOS 15.1
Python version (python --version)
3.11.9
PythonMonkey version (pip show pythonmonkey)
1.1.0
Bug Description
Hi,
I attempted to load the lightstreamer-client JavaScript library in Python using PythonMonkey as shown below:
import pythonmonkey as pm
lsc = pm.require("lightstreamer-client")However, I encountered the following error:
Traceback (most recent call last):
File ".../test.py", line 4, in <module>
lsc = pm.require("lightstreamer-client")
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/opt/homebrew/lib/python3.11/site-packages/pythonmonkey/require.py", line 431, in require
return createRequire(filename)(moduleIdentifier)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
RuntimeError: PythonMonkey cannot find a running Python event-loop to make asynchronous calls.Could you provide guidance on how to resolve this issue?
Thank you!
Activity
wiwichips commentedon Mar 25, 2025
Hi @arvindavoudi , this happens when the JavaScript code requires an event loop (for example: code that uses
setTimeout)You need to evaluate the JS code in a Python event loop. Refer to the
asynciostandard library: https://docs.python.org/3/library/asyncio.htmlNot sure if this will work in your use case, but try running: