Issue with DocArrayInMemoryStore

[cmbirk]

I've created the virtual environment, activated it, and installed the requirements. Is this a python version error or in need of a different package version?

Python Version: 3.12.2
pip version: 24.0

When attempting to run this part of the notebook:

from langchain_community.vectorstores import DocArrayInMemorySearch

vectorstore = DocArrayInMemorySearch.from_documents(pages, embedding=embeddings)

I'm getting the following error:

---------------------------------------------------------------------------
AttributeError                            Traceback (most recent call last)
Cell In[9], line 3
      1 from langchain_community.vectorstores import DocArrayInMemorySearch
----> 3 vectorstore = DocArrayInMemorySearch.from_documents(pages, embedding=embeddings)

File ~/Development/llm-local/.venv/lib/python3.12/site-packages/langchain_core/vectorstores.py:528, in VectorStore.from_documents(cls, documents, embedding, **kwargs)
    526 texts = [d.page_content for d in documents]
    527 metadatas = [d.metadata for d in documents]
--> 528 return cls.from_texts(texts, embedding, metadatas=metadatas, **kwargs)

File ~/Development/llm-local/.venv/lib/python3.12/site-packages/langchain_community/vectorstores/docarray/in_memory.py:68, in DocArrayInMemorySearch.from_texts(cls, texts, embedding, metadatas, **kwargs)
     46 @classmethod
     47 def from_texts(
     48     cls,
   (...)
     52     **kwargs: Any,
     53 ) -> DocArrayInMemorySearch:
     54     """Create an DocArrayInMemorySearch store and insert data.
     55 
     56     Args:
   (...)
     66         DocArrayInMemorySearch Vector Store
     67     """
---> 68     store = cls.from_params(embedding, **kwargs)
...
---> 46         return Generic.__class_getitem__.__func__(cls, item)  # type: ignore
     47         # this do nothing that checking that item is valid type var or str
     48     if not issubclass(item, BaseDoc):

AttributeError: 'builtin_function_or_method' object has no attribute '__func__'
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[svpino]

The problem might be with your version of Python. Try 3.9.

[markhallen]

The problem might be with your version of Python. Try 3.9.

This was exactly the issue for me.

I created a new virtual environment with version 3.9 and it worked!

# Remove the existing virtual environment
rm -rf .venv

# Create a new virtual environment with Python 3.9
python3.9 -m venv .venv