Add context to an output parsing error on Pydantic schema to improve exception handling

[msaelices]

Changes

• Fill the llm_output param when there is an output parsing error in a Pydantic schema so that we can get the original text that failed to parse when handling the exception

Background

With this change, we could do something like this:

output_parser = PydanticOutputParser(pydantic_object=pydantic_obj)
chain = ConversationChain(..., output_parser=output_parser)
try:
    response: PydanticSchema = chain.predict(input=input)
except OutputParserException as exc:
    logger.error(
        'OutputParserException while parsing chatbot response: %s', exc.llm_output,
    )

[vercel]

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1 Ignored Deployment

Name	Status	Preview	Comments	Updated (UTC)
langchain	⬜️ Ignored (Inspect)			Jul 7, 2023 6:09pm

[baskaryan]

thanks @msaelices!