AgentExecutor cannot be used

Checked other resources

[X] I added a very descriptive title to this issue.
[x] I searched the LangChain documentation with the integrated search.
[X] I used the GitHub search to find a similar question and didn't find it.
[X] I am sure that this is a bug in LangChain rather than my code.
[X] The bug is not resolved by updating to the latest stable version of LangChain (or the specific integration package).

Example Code

The following code is copied from the example provided by langchain to test this problem. ChatOpenAI uses the local environment deployed by xinference

    tools = [add, multiply]
    llm = ChatOpenAI(model=LLM_MODELS, openai_api_key="111",
                     openai_api_base="http://192.168.0.84:9997/v1", )
    query = "What is 3 * 12?"
    prompt = hub.pull("hwchase17/openai-functions-agent")
    agent = create_tool_calling_agent(llm, tools, prompt)
    agent_executor = AgentExecutor(agent=agent, tools=tools)
    print(agent_executor.invoke({"input": query}))

Error Message and Stack Trace (if applicable)

无

Description

Executing the code provided above will result in an error:

Traceback (most recent call last): File "D:\workSpace\algorithm-platform\project\gdsf\llm\tests\test1.py", line 47, in print(agent_executor.invoke({"input": query})) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "D:\workSpace\algorithm-platform\project\gdsf\llm\venv_test\Lib\site-packages\langchain\chains\base.py", line 170, in invoke raise e File "D:\workSpace\algorithm-platform\project\gdsf\llm\venv_test\Lib\site-packages\langchain\chains\base.py", line 160, in invoke self._call(inputs, run_manager=run_manager) File "D:\workSpace\algorithm-platform\project\gdsf\llm\venv_test\Lib\site-packages\langchain\agents\agent.py", line 1629, in _call next_step_output = self._take_next_step( ^^^^^^^^^^^^^^^^^^^^^ File "D:\workSpace\algorithm-platform\project\gdsf\llm\venv_test\Lib\site-packages\langchain\agents\agent.py", line 1335, in _take_next_step [ File "D:\workSpace\algorithm-platform\project\gdsf\llm\venv_test\Lib\site-packages\langchain\agents\agent.py", line 1335, in [ File "D:\workSpace\algorithm-platform\project\gdsf\llm\venv_test\Lib\site-packages\langchain\agents\agent.py", line 1363, in _iter_next_step output = self._action_agent.plan( ^^^^^^^^^^^^^^^^^^^^^^^^ File "D:\workSpace\algorithm-platform\project\gdsf\llm\venv_test\Lib\site-packages\langchain\agents\agent.py", line 580, in plan for chunk in self.runnable.stream(inputs, config={"callbacks": callbacks}): File "D:\workSpace\algorithm-platform\project\gdsf\llm\venv_test\Lib\site-packages\langchain_core\runnables\base.py", line 3405, in stream yield from self.transform(iter([input]), config, kwargs) File "D:\workSpace\algorithm-platform\project\gdsf\llm\venv_test\Lib\site-packages\langchain_core\runnables\base.py", line 3392, in transform yield from self._transform_stream_with_config( File "D:\workSpace\algorithm-platform\project\gdsf\llm\venv_test\Lib\site-packages\langchain_core\runnables\base.py", line 2193, in _transform_stream_with_config chunk: Output = context.run(next, iterator) # type: ignore ^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "D:\workSpace\algorithm-platform\project\gdsf\llm\venv_test\Lib\site-packages\langchain_core\runnables\base.py", line 3355, in _transform yield from final_pipeline File "D:\workSpace\algorithm-platform\project\gdsf\llm\venv_test\Lib\site-packages\langchain_core\runnables\base.py", line 1409, in transform for ichunk in input: File "D:\workSpace\algorithm-platform\project\gdsf\llm\venv_test\Lib\site-packages\langchain_core\runnables\base.py", line 5550, in transform yield from self.bound.transform( File "D:\workSpace\algorithm-platform\project\gdsf\llm\venv_test\Lib\site-packages\langchain_core\runnables\base.py", line 1427, in transform yield from self.stream(final, config, kwargs) File "D:\workSpace\algorithm-platform\project\gdsf\llm\venv_test\Lib\site-packages\langchain_core\language_models\chat_models.py", line 418, in stream raise e File "D:\workSpace\algorithm-platform\project\gdsf\llm\venv_test\Lib\site-packages\langchain_core\language_models\chat_models.py", line 398, in stream for chunk in self._stream(messages, stop=stop, **kwargs): File "D:\workSpace\algorithm-platform\project\gdsf\llm\venv_test\Lib\site-packages\langchain_openai\chat_models\base.py", line 626, in _stream chunk = chunk.model_dump() ^^^^^^^^^^^^^^^^^^ File "D:\workSpace\algorithm-platform\project\gdsf\llm\venv_test\Lib\site-packages\pydantic\main.py", line 390, in model_dump return self.__pydantic_serializer__.to_python( ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ TypeError: 'MockValSer' object cannot be converted to 'SchemaSerializer'

This error was solved by setting the environment variable DEFER_PYDANTIC_BUILD=0. However, when I executed it again, a new error occurred. I don't know how to solve it. I suspect that there is a compatibility issue with the openai interface of langchain. The error message is as follows:

D:\workSpace\algorithm-platform\project\gdsf\llm\venv_test\Lib\site-packages\pydantic\main.py:390: UserWarning: Pydantic serializer warnings: Expected ChoiceDeltaToolCall but got list with value [ChoiceDeltaToolCall(inde...ply'), type='function')] - serialized value may not be as expected return self.__pydantic_serializer__.to_python( Traceback (most recent call last): File "D:\workSpace\algorithm-platform\project\gdsf\llm\tests\test1.py", line 47, in print(agent_executor.invoke({"input": query})) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "D:\workSpace\algorithm-platform\project\gdsf\llm\venv_test\Lib\site-packages\langchain\chains\base.py", line 170, in invoke raise e File "D:\workSpace\algorithm-platform\project\gdsf\llm\venv_test\Lib\site-packages\langchain\chains\base.py", line 160, in invoke self._call(inputs, run_manager=run_manager) File "D:\workSpace\algorithm-platform\project\gdsf\llm\venv_test\Lib\site-packages\langchain\agents\agent.py", line 1629, in _call next_step_output = self._take_next_step( ^^^^^^^^^^^^^^^^^^^^^ File "D:\workSpace\algorithm-platform\project\gdsf\llm\venv_test\Lib\site-packages\langchain\agents\agent.py", line 1335, in _take_next_step [ File "D:\workSpace\algorithm-platform\project\gdsf\llm\venv_test\Lib\site-packages\langchain\agents\agent.py", line 1335, in [ File "D:\workSpace\algorithm-platform\project\gdsf\llm\venv_test\Lib\site-packages\langchain\agents\agent.py", line 1363, in _iter_next_step output = self._action_agent.plan( ^^^^^^^^^^^^^^^^^^^^^^^^ File "D:\workSpace\algorithm-platform\project\gdsf\llm\venv_test\Lib\site-packages\langchain\agents\agent.py", line 580, in plan for chunk in self.runnable.stream(inputs, config={"callbacks": callbacks}): File "D:\workSpace\algorithm-platform\project\gdsf\llm\venv_test\Lib\site-packages\langchain_core\runnables\base.py", line 3405, in stream yield from self.transform(iter([input]), config, kwargs) File "D:\workSpace\algorithm-platform\project\gdsf\llm\venv_test\Lib\site-packages\langchain_core\runnables\base.py", line 3392, in transform yield from self._transform_stream_with_config( File "D:\workSpace\algorithm-platform\project\gdsf\llm\venv_test\Lib\site-packages\langchain_core\runnables\base.py", line 2193, in _transform_stream_with_config chunk: Output = context.run(next, iterator) # type: ignore ^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "D:\workSpace\algorithm-platform\project\gdsf\llm\venv_test\Lib\site-packages\langchain_core\runnables\base.py", line 3355, in _transform yield from final_pipeline File "D:\workSpace\algorithm-platform\project\gdsf\llm\venv_test\Lib\site-packages\langchain_core\runnables\base.py", line 1409, in transform for ichunk in input: File "D:\workSpace\algorithm-platform\project\gdsf\llm\venv_test\Lib\site-packages\langchain_core\runnables\base.py", line 5550, in transform yield from self.bound.transform( File "D:\workSpace\algorithm-platform\project\gdsf\llm\venv_test\Lib\site-packages\langchain_core\runnables\base.py", line 1427, in transform yield from self.stream(final, config, kwargs) File "D:\workSpace\algorithm-platform\project\gdsf\llm\venv_test\Lib\site-packages\langchain_core\language_models\chat_models.py", line 418, in stream raise e File "D:\workSpace\algorithm-platform\project\gdsf\llm\venv_test\Lib\site-packages\langchain_core\language_models\chat_models.py", line 398, in stream for chunk in self._stream(messages, stop=stop, **kwargs): File "D:\workSpace\algorithm-platform\project\gdsf\llm\venv_test\Lib\site-packages\langchain_openai\chat_models\base.py", line 627, in _stream generation_chunk = _convert_chunk_to_generation_chunk( ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "D:\workSpace\algorithm-platform\project\gdsf\llm\venv_test\Lib\site-packages\langchain_openai\chat_models\base.py", line 309, in _convert_chunk_to_generation_chunk message_chunk = _convert_delta_to_message_chunk( ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "D:\workSpace\algorithm-platform\project\gdsf\llm\venv_test\Lib\site-packages\langchain_openai\chat_models\base.py", line 248, in _convert_delta_to_message_chunk tool_call_chunks = [ ^ File "D:\workSpace\algorithm-platform\project\gdsf\llm\venv_test\Lib\site-packages\langchain_openai\chat_models\base.py", line 250, in name=rtc["function"].get("name"),
TypeError: list indices must be integers or slices, not str

System Info

System Information

OS: Windows OS Version: 10.0.19045 Python Version: 3.11.7 | packaged by Anaconda, Inc. | (main, Dec 15 2023, 18:05:47) [MSC v.1916 64 bit (AMD64)]

Package Information

langchain_core: 0.3.5 langchain: 0.3.0 langsmith: 0.1.125 langchain_openai: 0.2.0 langchain_text_splitters: 0.3.0 langgraph: 0.2.23

Optional packages not installed

langserve

Other Dependencies

aiohttp: 3.10.5 async-timeout: Installed. No version info available. httpx: 0.27.2 jsonpatch: 1.33 langgraph-checkpoint: 1.0.10 numpy: 1.26.4 openai: 1.47.0 orjson: 3.10.7 packaging: 24.1 pydantic: 2.9.2 PyYAML: 6.0.2 requests: 2.32.3 SQLAlchemy: 2.0.35 tenacity: 8.5.0 tiktoken: 0.7.0 typing-extensions: 4.12.2

langchain-ai / langchain

AgentExecutor cannot be used #26760