python

LangChain Agent Output Parse Failure

langchain.*agent.*Could not parse LLM output

Fixes

1.Use handle_parsing_errors=True in AgentExecutor
2.Add format instructions to agent prompt
3.Switch to structured-chat-agent for more reliable parsing

langchainagentparsing

Related Errors

Asyncio event loop already running

RuntimeError: This event loop is already running

•Use nest_asyncio.apply() to allow nested event loops
•Use asyncio.run_coroutine_threadsafe() instead of asyncio.run()

Coroutine never awaited

RuntimeWarning: coroutine '.*' was never awaited

•Add 'await' before the coroutine call
•Use asyncio.create_task() to schedule the coroutine

Asyncio task was cancelled

asyncio\.CancelledError

•Handle CancelledError in try/except within the task
•Use asyncio.shield() to protect critical sections from cancellation