with_structured_output format depends on whether we're using pydantic proper or pydantic.v1 namespace about langchain

[eyurtsev]

There's a bug in the chat model when checking whether a pydantic model (from pydantic import BaseModel) ends up being classified as not a pydantic model.

But if we fix that logic, we get stuck here:

langchain/libs/core/langchain_core/output_parsers/openai_tools.py

Line 177 in 232908a

tools: List[Type[BaseModel]]

The code

class PydanticToolsParser(JsonOutputToolsParser):
    """Parse tools from OpenAI response."""

    tools: List[Type[BaseModel]]

Which will not work since JsonOutputToolsParser inherits from BaseModel as well

[hinthornw]

It also emits the wrong schema in general for nested objects