`langchain_community.vectorstores.bageldb`.Bagel¶

class langchain_community.vectorstores.bageldb.Bagel(cluster_name: str = 'langchain', client_settings: Optional[bagel.config.Settings] = None, embedding_function: Optional[Embeddings] = None, cluster_metadata: Optional[Dict] = None, client: Optional[bagel.Client] = None, relevance_score_fn: Optional[Callable[[float], float]] = None)[source]¶

BagelDB.ai vector store.

To use, you should have the betabageldb python package installed.

Example

from langchain_community.vectorstores import Bagel
vectorstore = Bagel(cluster_name="langchain_store")

Initialize with bagel client

Attributes

embeddings

Access the query embedding object if available.

Methods

`__init__`([cluster_name, client_settings, ...])	Initialize with bagel client
`aadd_documents`(documents, **kwargs)	Run more documents through the embeddings and add to the vectorstore.
`aadd_texts`(texts[, metadatas])	Run more texts through the embeddings and add to the vectorstore.
`add_documents`(documents, **kwargs)	Run more documents through the embeddings and add to the vectorstore.
`add_texts`(texts[, metadatas, ids, embeddings])	Add texts along with their corresponding embeddings and optional metadata to the BagelDB cluster.
`adelete`([ids])	Delete by vector ID or other criteria.
`afrom_documents`(documents, embedding, **kwargs)	Return VectorStore initialized from documents and embeddings.
`afrom_texts`(texts, embedding[, metadatas])	Return VectorStore initialized from texts and embeddings.
`amax_marginal_relevance_search`(query[, k, ...])	Return docs selected using the maximal marginal relevance.
`amax_marginal_relevance_search_by_vector`(...)	Return docs selected using the maximal marginal relevance.
`as_retriever`(**kwargs)	Return VectorStoreRetriever initialized from this VectorStore.
`asearch`(query, search_type, **kwargs)	Return docs most similar to query using specified search type.
`asimilarity_search`(query[, k])	Return docs most similar to query.
`asimilarity_search_by_vector`(embedding[, k])	Return docs most similar to embedding vector.
`asimilarity_search_with_relevance_scores`(query)	Return docs and relevance scores in the range [0, 1], asynchronously.
`asimilarity_search_with_score`(args, *kwargs)	Run similarity search with distance asynchronously.
`delete`([ids])	Delete by IDs.
`delete_cluster`()	Delete the cluster.
`from_documents`(documents[, embedding, ids, ...])	Create a Bagel vectorstore from a list of documents.
`from_texts`(texts[, embedding, metadatas, ...])	Create and initialize a Bagel instance from list of texts.
`get`([ids, where, limit, offset, ...])	Gets the collection.
`max_marginal_relevance_search`(query[, k, ...])	Return docs selected using the maximal marginal relevance.
`max_marginal_relevance_search_by_vector`(...)	Return docs selected using the maximal marginal relevance.
`search`(query, search_type, **kwargs)	Return docs most similar to query using specified search type.
`similarity_search`(query[, k, where])	Run a similarity search with BagelDB.
`similarity_search_by_vector`(embedding[, k, ...])	Return docs most similar to embedding vector.
`similarity_search_by_vector_with_relevance_scores`(...)	Return docs most similar to embedding vector and similarity score.
`similarity_search_with_relevance_scores`(query)	Return docs and relevance scores in the range [0, 1].
`similarity_search_with_score`(query[, k, where])	Run a similarity search with BagelDB and return documents with their corresponding similarity scores.
`update_document`(document_id, document)	Update a document in the cluster.

__init__(cluster_name: str = 'langchain', client_settings: Optional[bagel.config.Settings] = None, embedding_function: Optional[Embeddings] = None, cluster_metadata: Optional[Dict] = None, client: Optional[bagel.Client] = None, relevance_score_fn: Optional[Callable[[float], float]] = None) → None[source]¶: Initialize with bagel client

async aadd_documents(documents: List[Document], **kwargs: Any) → List[str]¶

Run more documents through the embeddings and add to the vectorstore.

Parameters: (List[Document] (documents) – Documents to add to the vectorstore.
Returns: List of IDs of the added texts.
Return type: List[str]

async aadd_texts(texts: Iterable[str], metadatas: Optional[List[dict]] = None, **kwargs: Any) → List[str]¶: Run more texts through the embeddings and add to the vectorstore.

add_documents(documents: List[Document], **kwargs: Any) → List[str]¶

Run more documents through the embeddings and add to the vectorstore.

Parameters: (List[Document] (documents) – Documents to add to the vectorstore.
Returns: List of IDs of the added texts.
Return type: List[str]

add_texts(texts: Iterable[str], metadatas: Optional[List[dict]] = None, ids: Optional[List[str]] = None, embeddings: Optional[List[List[float]]] = None, **kwargs: Any) → List[str][source]¶

Add texts along with their corresponding embeddings and optional metadata to the BagelDB cluster.

Parameters

texts (Iterable[str]) – Texts to be added.
embeddings (Optional[List[float]]) – List of embeddingvectors
metadatas (Optional[List[dict]]) – Optional list of metadatas.
ids (Optional[List[str]]) – List of unique ID for the texts.

Returns

List of unique ID representing the added texts.

Return type

List[str]

async adelete(ids: Optional[List[str]] = None, **kwargs: Any) → Optional[bool]¶

Delete by vector ID or other criteria.

Parameters

ids – List of ids to delete.
**kwargs – Other keyword arguments that subclasses might use.

Returns

True if deletion is successful, False otherwise, None if not implemented.

Return type

Optional[bool]

async classmethod afrom_documents(documents: List[Document], embedding: Embeddings, **kwargs: Any) → VST¶: Return VectorStore initialized from documents and embeddings.

async classmethod afrom_texts(texts: List[str], embedding: Embeddings, metadatas: Optional[List[dict]] = None, **kwargs: Any) → VST¶: Return VectorStore initialized from texts and embeddings.

async amax_marginal_relevance_search(query: str, k: int = 4, fetch_k: int = 20, lambda_mult: float = 0.5, **kwargs: Any) → List[Document]¶: Return docs selected using the maximal marginal relevance.

async amax_marginal_relevance_search_by_vector(embedding: List[float], k: int = 4, fetch_k: int = 20, lambda_mult: float = 0.5, **kwargs: Any) → List[Document]¶: Return docs selected using the maximal marginal relevance.

as_retriever(**kwargs: Any) → VectorStoreRetriever¶

Return VectorStoreRetriever initialized from this VectorStore.

Parameters

search_type (Optional[str]) – Defines the type of search that the Retriever should perform. Can be “similarity” (default), “mmr”, or “similarity_score_threshold”.
search_kwargs (Optional[Dict]) –
Keyword arguments to pass to the search function. Can include things like:

k: Amount of documents to return (Default: 4) score_threshold: Minimum relevance threshold

for similarity_score_threshold

fetch_k: Amount of documents to pass to MMR algorithm (Default: 20) lambda_mult: Diversity of results returned by MMR;

1 for minimum diversity and 0 for maximum. (Default: 0.5)

filter: Filter by document metadata

Returns

Retriever class for VectorStore.

Return type

VectorStoreRetriever

Examples:

# Retrieve more documents with higher diversity
# Useful if your dataset has many similar documents
docsearch.as_retriever(
    search_type="mmr",
    search_kwargs={'k': 6, 'lambda_mult': 0.25}
)

# Fetch more documents for the MMR algorithm to consider
# But only return the top 5
docsearch.as_retriever(
    search_type="mmr",
    search_kwargs={'k': 5, 'fetch_k': 50}
)

# Only retrieve documents that have a relevance score
# Above a certain threshold
docsearch.as_retriever(
    search_type="similarity_score_threshold",
    search_kwargs={'score_threshold': 0.8}
)

# Only get the single most similar document from the dataset
docsearch.as_retriever(search_kwargs={'k': 1})

# Use a filter to only retrieve documents from a specific paper
docsearch.as_retriever(
    search_kwargs={'filter': {'paper_title':'GPT-4 Technical Report'}}
)

async asearch(query: str, search_type: str, **kwargs: Any) → List[Document]¶: Return docs most similar to query using specified search type.

async asimilarity_search(query: str, k: int = 4, **kwargs: Any) → List[Document]¶: Return docs most similar to query.

async asimilarity_search_by_vector(embedding: List[float], k: int = 4, **kwargs: Any) → List[Document]¶: Return docs most similar to embedding vector.

async asimilarity_search_with_relevance_scores(query: str, k: int = 4, **kwargs: Any) → List[Tuple[Document, float]]¶

Return docs and relevance scores in the range [0, 1], asynchronously.

0 is dissimilar, 1 is most similar.

Parameters

query – input text
k – Number of Documents to return. Defaults to 4.
**kwargs –
kwargs to be passed to similarity search. Should include: score_threshold: Optional, a floating point value between 0 to 1 to

filter the resulting set of retrieved docs

Returns

List of Tuples of (doc, similarity_score)

async asimilarity_search_with_score(*args: Any, **kwargs: Any) → List[Tuple[Document, float]]¶: Run similarity search with distance asynchronously.

delete(ids: Optional[List[str]] = None, **kwargs: Any) → None[source]¶

Delete by IDs.

Parameters: ids – List of ids to delete.

delete_cluster() → None[source]¶: Delete the cluster.

classmethod from_documents(documents: List[Document], embedding: Optional[Embeddings] = None, ids: Optional[List[str]] = None, cluster_name: str = 'langchain', client_settings: Optional[bagel.config.Settings] = None, client: Optional[bagel.Client] = None, cluster_metadata: Optional[Dict] = None, **kwargs: Any) → Bagel[source]¶

Create a Bagel vectorstore from a list of documents.

Parameters

documents (List[Document]) – List of Document objects to add to the Bagel vectorstore.
embedding (Optional[List[float]]) – List of embedding.
ids (Optional[List[str]]) – List of IDs. Defaults to None.
cluster_name (str) – The name of the BagelDB cluster.
client_settings (Optional[bagel.config.Settings]) – Client settings.
client (Optional[bagel.Client]) – Bagel client instance.
cluster_metadata (Optional[Dict]) – Metadata associated with the Bagel cluster. Defaults to None.

Returns

Bagel vectorstore.

Return type

Bagel

classmethod from_texts(texts: List[str], embedding: Optional[Embeddings] = None, metadatas: Optional[List[dict]] = None, ids: Optional[List[str]] = None, cluster_name: str = 'langchain', client_settings: Optional[bagel.config.Settings] = None, cluster_metadata: Optional[Dict] = None, client: Optional[bagel.Client] = None, text_embeddings: Optional[List[List[float]]] = None, **kwargs: Any) → Bagel[source]¶

Create and initialize a Bagel instance from list of texts.

Parameters

texts (List[str]) – List of text content to be added.
cluster_name (str) – The name of the BagelDB cluster.
client_settings (Optional[bagel.config.Settings]) – Client settings.
cluster_metadata (Optional[Dict]) – Metadata of the cluster.
embeddings (Optional[Embeddings]) – List of embedding.
metadatas (Optional[List[dict]]) – List of metadata.
ids (Optional[List[str]]) – List of unique ID. Defaults to None.
client (Optional[bagel.Client]) – Bagel client instance.

Returns

Bagel vectorstore.

Return type

Bagel

get(ids: Optional[OneOrMany[ID]] = None, where: Optional[Where] = None, limit: Optional[int] = None, offset: Optional[int] = None, where_document: Optional[WhereDocument] = None, include: Optional[List[str]] = None) → Dict[str, Any][source]¶: Gets the collection.

max_marginal_relevance_search(query: str, k: int = 4, fetch_k: int = 20, lambda_mult: float = 0.5, **kwargs: Any) → List[Document]¶

Return docs selected using the maximal marginal relevance.

Maximal marginal relevance optimizes for similarity to query AND diversity among selected documents.

Parameters

query – Text to look up documents similar to.
k – Number of Documents to return. Defaults to 4.
fetch_k – Number of Documents to fetch to pass to MMR algorithm.
lambda_mult – Number between 0 and 1 that determines the degree of diversity among the results with 0 corresponding to maximum diversity and 1 to minimum diversity. Defaults to 0.5.

Returns

List of Documents selected by maximal marginal relevance.

max_marginal_relevance_search_by_vector(embedding: List[float], k: int = 4, fetch_k: int = 20, lambda_mult: float = 0.5, **kwargs: Any) → List[Document]¶

Return docs selected using the maximal marginal relevance.

Maximal marginal relevance optimizes for similarity to query AND diversity among selected documents.

Parameters

embedding – Embedding to look up documents similar to.
k – Number of Documents to return. Defaults to 4.
fetch_k – Number of Documents to fetch to pass to MMR algorithm.
lambda_mult – Number between 0 and 1 that determines the degree of diversity among the results with 0 corresponding to maximum diversity and 1 to minimum diversity. Defaults to 0.5.

Returns

List of Documents selected by maximal marginal relevance.

search(query: str, search_type: str, **kwargs: Any) → List[Document]¶: Return docs most similar to query using specified search type.

similarity_search(query: str, k: int = 5, where: Optional[Dict[str, str]] = None, **kwargs: Any) → List[Document][source]¶

Run a similarity search with BagelDB.

Parameters

query (str) – The query text to search for similar documents/texts.
k (int) – The number of results to return.
where (Optional[Dict[str, str]]) – Metadata filters to narrow down.

Returns

List of documents objects representing the documents most similar to the query text.

Return type

List[Document]

similarity_search_by_vector(embedding: List[float], k: int = 5, where: Optional[Dict[str, str]] = None, **kwargs: Any) → List[Document][source]¶: Return docs most similar to embedding vector.

similarity_search_by_vector_with_relevance_scores(query_embeddings: List[float], k: int = 5, where: Optional[Dict[str, str]] = None, **kwargs: Any) → List[Tuple[Document, float]][source]¶: Return docs most similar to embedding vector and similarity score.

similarity_search_with_relevance_scores(query: str, k: int = 4, **kwargs: Any) → List[Tuple[Document, float]]¶

Return docs and relevance scores in the range [0, 1].

0 is dissimilar, 1 is most similar.

Parameters

query – input text
k – Number of Documents to return. Defaults to 4.
**kwargs –
kwargs to be passed to similarity search. Should include: score_threshold: Optional, a floating point value between 0 to 1 to

filter the resulting set of retrieved docs

Returns

List of Tuples of (doc, similarity_score)

similarity_search_with_score(query: str, k: int = 5, where: Optional[Dict[str, str]] = None, **kwargs: Any) → List[Tuple[Document, float]][source]¶

Run a similarity search with BagelDB and return documents with their corresponding similarity scores.

Parameters

query (str) – The query text to search for similar documents.
k (int) – The number of results to return.
where (Optional[Dict[str, str]]) – Filter using metadata.

Returns

List of tuples, each containing a Document object representing a similar document and its corresponding similarity score.

Return type

List[Tuple[Document, float]]

update_document(document_id: str, document: Document) → None[source]¶

Update a document in the cluster.

Parameters

document_id (str) – ID of the document to update.
document (Document) – Document to update.

Examples using Bagel¶

BagelDB

langchain_community.vectorstores.bageldb.Bagel¶

Examples using Bagel¶

`langchain_community.vectorstores.bageldb`.Bagel¶