'This event loop is already running' error when using LiteLLM inside another event loop

[martinscooper]

LiteLLMInferenceEngine, as it is implemented on unitxt, creates an event loop. FastAPI/Jupyter Notebooks also create one. asyncio doesn't allow nested loop, so we need to rely on nest_asyncio to handle them.

We should catch this error and add an error message with instructions and suggested fix

Refer to this discussion for more details.

[github-actions[bot]]

This issue is stale because it has been open for 30 days with no activity.