The `gpt-synthesizer`command produces this error.

[razsa]

gpt-synthesizer
/Users/<>/Documents/dev/GPT-Syn/.venv/lib/python3.11/site-packages/langchain/chat_models/init.py:31: LangChainDeprecationWarning: Importing chat models from langchain is deprecated. Importing from langchain will no longer be supported as of langchain==0.2.0. Please import from langchain-community instead:

from langchain_community.chat_models import ChatOpenAI.

To install langchain-community run pip install -U langchain-community.
warnings.warn(
/Users/<>/Documents/dev/GPT-Syn/.venv/lib/python3.11/site-packages/langchain_core/_api/deprecation.py:117: LangChainDeprecationWarning: The class langchain_community.chat_models.openai.ChatOpenAI was deprecated in langchain-community 0.0.10 and will be removed in 0.2.0. An updated version of the class exists in the langchain-openai package and should be used instead. To use it run pip install -U langchain-openai and import as from langchain_openai import ChatOpenAI.
warn_deprecated(
Traceback (most recent call last):
File "/Users/<>/Documents/dev/GPT-Syn/.venv/bin/gpt-synthesizer", line 8, in
sys.exit(main())
^^^^^^
File "/Users/<>/Documents/dev/GPT-Syn/.venv/lib/python3.11/site-packages/gpt_synthesizer/main.py", line 31, in main
comp_prompt, comp_parser = get_comp_prompt()
^^^^^^^^^^^^^^^^^
File "/Users/<>/Documents/dev/GPT-Syn/.venv/lib/python3.11/site-packages/gpt_synthesizer/prompt.py", line 22, in get_comp_prompt
parser = get_comp_parser()
^^^^^^^^^^^^^^^^^
File "/Users/<>/Documents/dev/GPT-Syn/.venv/lib/python3.11/site-packages/gpt_synthesizer/parser.py", line 16, in get_comp_parser
return PydanticOutputParser(pydantic_object=CompList)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/Users/<>/Documents/dev/GPT-Syn/.venv/lib/python3.11/site-packages/langchain_core/load/serializable.py", line 120, in init
super().init(**kwargs)
File "/Users/<>/Documents/dev/GPT-Syn/.venv/lib/python3.11/site-packages/pydantic/v1/main.py", line 341, in init
raise validation_error
pydantic.v1.error_wrappers.ValidationError: 1 validation error for PydanticOutputParser
pydantic_object
subclass of BaseModel expected (type=type_error.subclass; expected_class=BaseModel)

[saeedshamshiri]

Thanks for the feedback. We will get back to you shortly.

[RoboCoachian]

Hi @razsa,
This is issue seems to be related to the recent changes in LangChain code base. consider setting your LangChain version to 0.0.320.

Please let us know if that solves your issue. Thanks!