Langchain 0.0.302 breaks langchain integration

[timothyjlaurent]

See the stacktrace below

File ~/.pyenv/versions/3.11.3/envs/document_classifier/lib/python3.11/site-packages/spacy_llm/models/langchain/model.py:106, in LangChain.register_models()
     98 if not has_langchain or any(
     99     [
    100         (handle.startswith("langchain"))
    101         for handle in registry.llm_models.get_all()
    102     ]
    103 ):
    104     return
--> 106 for class_id, cls in LangChain.get_type_to_cls_dict().items():
    107     registry.llm_models.register(
    108         f"langchain.{cls.__name__}.v1",
    109         func=LangChain._langchain_model_maker(class_id=class_id),
    110     )

File ~/.pyenv/versions/3.11.3/envs/document_classifier/lib/python3.11/site-packages/spacy_llm/models/langchain/model.py:38, in LangChain.get_type_to_cls_dict()
     33 @staticmethod
     34 def get_type_to_cls_dict() -> Dict[str, Type["langchain.llms.base.BaseLLM"]]:
     35     """Returns langchain.llms.type_to_cls_dict.
     36     RETURNS (Dict[str, Type[langchain.llms.base.BaseLLM]]): langchain.llms.type_to_cls_dict.
     37     """
---> 38     return langchain.llms.type_to_cls_dict

File ~/.pyenv/versions/3.11.3/envs/document_classifier/lib/python3.11/site-packages/langchain/__init__.py:308, in __getattr__(name)
    306     return SerpAPIWrapper
    307 else:
--> 308     raise AttributeError(f"Could not find: {name}")

AttributeError: Could not find: llms

spacy_llm/models/langchain/model.py:38, imports langchain.llms.type_to_cls_dict but as of yesterday's Langchain release - https://github.com/langchain-ai/langchain/pull/11017/files they make this import raise an Attribute error that isn't present in their init.py`

They warn:

    warnings.warn(
        f"Importing {name} from langchain root module is no longer supported."
    )

[rmitsch]

Hi @timothyjlaurent, thanks for reporting this! Unfortunately the langchain API is rather unstable, which is why we pinned it to a specific version in spacy-llm. We'll look into supporting and pinning to 0.0.302 soon.

[rmitsch]

This is fixed in main and will be available in the next release (published probably this week).