Python 3.14 incompatibility: RuntimeError: There is no current event loop in thread 'MainThread'

[alsugiliazova]

When using Python 3.14, I encounter the following error on import:

RuntimeError: There is no current event loop in thread 'MainThread'.

The traceback points to:

testflows/_core/parallel/asyncio.py: loop = asyncio.get_event_loop()

This appears to be caused by a change in Python 3.14 behavior:

• asyncio.get_event_loop() now raises a RuntimeError if no event loop has been set in the current thread.
• Previously, it would implicitly create one in the main thread.

Since TestFlows calls asyncio.get_event_loop() at import time, the import fails under Python 3.14.

For now, I switched back to Python 3.12 and everything works correctly.