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langchain/libs/community
mwmajewsk e192f6b6eb
community[patch]: fix, better error message in deeplake vectoriser (#18397)
If the document loader recieves Pathlib path instead of str, it reads
the file correctly, but the problem begins when the document is added to
Deeplake.
This problem arises from casting the path to str in the metadata.

```python
deeplake = True
fname = Path('./lorem_ipsum.txt')
loader = TextLoader(fname, encoding="utf-8")
docs = loader.load_and_split()
text_splitter = CharacterTextSplitter(chunk_size=1000, chunk_overlap=100)
chunks= text_splitter.split_documents(docs)
if deeplake:
    db = DeepLake(dataset_path=ds_path, embedding=embeddings, token=activeloop_token)
    db.add_documents(chunks)
else:
    db = Chroma.from_documents(docs, embeddings)
```

So using this snippet of code the error message for deeplake looks like
this:

```
[part of error message omitted]

Traceback (most recent call last):
  File "/home/mwm/repositories/sources/fixing_langchain/main.py", line 53, in <module>
    db.add_documents(chunks)
  File "/home/mwm/repositories/sources/langchain/libs/core/langchain_core/vectorstores.py", line 139, in add_documents
    return self.add_texts(texts, metadatas, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/mwm/repositories/sources/langchain/libs/community/langchain_community/vectorstores/deeplake.py", line 258, in add_texts
    return self.vectorstore.add(
           ^^^^^^^^^^^^^^^^^^^^^
  File "/home/mwm/anaconda3/envs/langchain/lib/python3.11/site-packages/deeplake/core/vectorstore/deeplake_vectorstore.py", line 226, in add
    return self.dataset_handler.add(
           ^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/mwm/anaconda3/envs/langchain/lib/python3.11/site-packages/deeplake/core/vectorstore/dataset_handlers/client_side_dataset_handler.py", line 139, in add
    dataset_utils.extend_or_ingest_dataset(
  File "/home/mwm/anaconda3/envs/langchain/lib/python3.11/site-packages/deeplake/core/vectorstore/vector_search/dataset/dataset.py", line 544, in extend_or_ingest_dataset
    extend(
  File "/home/mwm/anaconda3/envs/langchain/lib/python3.11/site-packages/deeplake/core/vectorstore/vector_search/dataset/dataset.py", line 505, in extend
    dataset.extend(batched_processed_tensors, progressbar=False)
  File "/home/mwm/anaconda3/envs/langchain/lib/python3.11/site-packages/deeplake/core/dataset/dataset.py", line 3247, in extend
    raise SampleExtendError(str(e)) from e.__cause__
deeplake.util.exceptions.SampleExtendError: Failed to append a sample to the tensor 'metadata'. See more details in the traceback. If you wish to skip the samples that cause errors, please specify `ignore_errors=True`.
```

Which is does not explain the error well enough.
The same error for chroma looks like this 

```
During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/mwm/repositories/sources/fixing_langchain/main.py", line 56, in <module>
    db = Chroma.from_documents(docs, embeddings)
         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/mwm/repositories/sources/langchain/libs/community/langchain_community/vectorstores/chroma.py", line 778, in from_documents
    return cls.from_texts(
           ^^^^^^^^^^^^^^^
  File "/home/mwm/repositories/sources/langchain/libs/community/langchain_community/vectorstores/chroma.py", line 736, in from_texts
    chroma_collection.add_texts(
  File "/home/mwm/repositories/sources/langchain/libs/community/langchain_community/vectorstores/chroma.py", line 309, in add_texts
    raise ValueError(e.args[0] + "\n\n" + msg)
ValueError: Expected metadata value to be a str, int, float or bool, got lorem_ipsum.txt which is a <class 'pathlib.PosixPath'>

Try filtering complex metadata from the document using langchain_community.vectorstores.utils.filter_complex_metadata.
```

Which is way more user friendly, so I just added information about
possible mismatch of the type in the error message, the same way it is
covered in chroma
https://github.com/langchain-ai/langchain/blob/master/libs/community/langchain_community/vectorstores/chroma.py#L224
7 months ago
..
langchain_community community[patch]: fix, better error message in deeplake vectoriser (#18397) 7 months ago
scripts infra: add print rule to ruff (#16221) 8 months ago
tests community[patch]: Voyage AI updates default model and batch size (#17655) 7 months ago
Makefile community[minor]: add Kinetica LLM wrapper (#17879) 7 months ago
README.md Batch update of alt text and title attributes for images in md/mdx files across repo (#15357) 9 months ago
poetry.lock text-splitters[minor], langchain[minor], community[patch], templates, docs: langchain-text-splitters 0.0.1 (#18346) 7 months ago
pyproject.toml text-splitters[minor], langchain[minor], community[patch], templates, docs: langchain-text-splitters 0.0.1 (#18346) 7 months ago

README.md

🦜🧑‍🤝‍🧑 LangChain Community

Downloads License: MIT

Quick Install

pip install langchain-community

What is it?

LangChain Community contains third-party integrations that implement the base interfaces defined in LangChain Core, making them ready-to-use in any LangChain application.

For full documentation see the API reference.

Diagram outlining the hierarchical organization of the LangChain framework, displaying the interconnected parts across multiple layers.

📕 Releases & Versioning

langchain-community is currently on version 0.0.x

All changes will be accompanied by a patch version increase.

💁 Contributing

As an open-source project in a rapidly developing field, we are extremely open to contributions, whether it be in the form of a new feature, improved infrastructure, or better documentation.

For detailed information on how to contribute, see the Contributing Guide.