Getting a "'_thread.RLock'" object error when instantiating a LangChain model as a default object

[DmitriyLeybel]

ALL software version info

param==2.1.0
langchain-openai==0.1.9

Description of expected behavior and the observed behavior

The following errors out when setting the default instantiation of a ChatOpenAI object on a parameter:

import param
from langchain_openai import ChatOpenAI

class TestClass(param.Parameterized):
    model = param.ClassSelector(class_=ChatOpenAI, default=ChatOpenAI())

TestClass()

This is likely because ChatOpenAI is meant to handle concurrency.

I am able to work around this by instantiating the model in the init:

import param
from langchain_openai import ChatOpenAI

class TestClass(param.Parameterized):
    model = param.ClassSelector(class_=ChatOpenAI, default=None)

    def __init__(self, **params):
        super().__init__(**params)
        self.model = ChatOpenAI()


TestClass()

This isn't an ideal solution, as it feels like a hacky workaround and adds overhead to the codebase.