`langchain_community.vectorstores.alibabacloud_opensearch`.AlibabaCloudOpenSearch¶

class langchain_community.vectorstores.alibabacloud_opensearch.AlibabaCloudOpenSearch(embedding: Embeddings, config: AlibabaCloudOpenSearchSettings, **kwargs: Any)[source]¶

Alibaba Cloud OpenSearch vector store.

Attributes

embeddings

Access the query embedding object if available.

Methods

`__init__`(embedding, config, **kwargs)
`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])	Insert documents into the instance.. :param texts: The text segments to be inserted into the vector storage, should not be empty. :param metadatas: Metadata information.
`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.
`create_inverse_metadata`(fields)	Create metadata from fields.
`create_results`(json_result)	Assemble documents.
`create_results_with_score`(json_result)	Parsing the returned results with scores.
`delete`([ids])	Delete by vector ID or other criteria.
`delete_documents_with_document_id`(id_list)	Delete documents based on their IDs.
`delete_documents_with_texts`(texts)	Delete documents based on their page content.
`from_documents`(documents, embedding[, config])	Create alibaba cloud opensearch vector store instance.
`from_texts`(texts, embedding[, metadatas, config])	Create alibaba cloud opensearch vector store instance.
`inner_embedding_query`(embedding[, ...])
`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, search_filter])	Perform similarity retrieval based on text.
`similarity_search_by_vector`(embedding[, k, ...])	Perform retrieval directly using vectors.
`similarity_search_with_relevance_scores`(query)	Perform similarity retrieval based on text with scores.
`similarity_search_with_score`(args, *kwargs)	Run similarity search with distance.

Parameters

embedding (Embeddings) –
config (AlibabaCloudOpenSearchSettings) –
kwargs (Any) –

__init__(embedding: Embeddings, config: AlibabaCloudOpenSearchSettings, **kwargs: Any) → None[source]¶

Parameters

embedding (Embeddings) –
config (AlibabaCloudOpenSearchSettings) –
kwargs (Any) –

Return type

None

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.
documents (List[Document]) –
kwargs (Any) –

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.

Parameters

texts (Iterable[str]) –
metadatas (Optional[List[dict]]) –
kwargs (Any) –

Return type

List[str]

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.
documents (List[Document]) –
kwargs (Any) –

Returns

List of IDs of the added texts.

Return type

List[str]

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

Insert documents into the instance.. :param texts: The text segments to be inserted into the vector storage,

should not be empty.

Parameters

metadatas (Optional[List[dict]]) – Metadata information.
texts (Iterable[str]) –
kwargs (Any) –

Returns

List of document IDs.

Return type

id_list

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

Delete by vector ID or other criteria.

Parameters

ids (Optional[List[str]]) – List of ids to delete.
**kwargs (Any) – 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.

Parameters

documents (List[Document]) –
embedding (Embeddings) –
kwargs (Any) –

Return type

VST

async classmethod afrom_texts(texts: List[str], embedding: Embeddings, metadatas: Optional[List[dict]] = None, **kwargs: Any) → VST¶

Return VectorStore initialized from texts and embeddings.

Parameters

texts (List[str]) –
embedding (Embeddings) –
metadatas (Optional[List[dict]]) –
kwargs (Any) –

Return type

VST

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.

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

Parameters

query (str) – Text to look up documents similar to.
k (int) – Number of Documents to return. Defaults to 4.
fetch_k (int) – Number of Documents to fetch to pass to MMR algorithm.
lambda_mult (float) – 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.
kwargs (Any) –

Returns

List of Documents selected by maximal marginal relevance.

Return type

List[Document]

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.

Parameters

embedding (List[float]) –
k (int) –
fetch_k (int) –
lambda_mult (float) –
kwargs (Any) –

Return type

List[Document]

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
kwargs (Any) –

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.

Parameters

query (str) –
search_type (str) –
kwargs (Any) –

Return type

List[Document]

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

Return docs most similar to query.

Parameters

query (str) –
k (int) –
kwargs (Any) –

Return type

List[Document]

async asimilarity_search_by_vector(embedding: List[float], k: int = 4, **kwargs: Any) → List[Document]¶

Return docs most similar to embedding vector.

Parameters

embedding (List[float]) –
k (int) –
kwargs (Any) –

Return type

List[Document]

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 (str) – input text
k (int) – Number of Documents to return. Defaults to 4.
**kwargs (Any) –
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)

Return type

List[Tuple[Document, float]]

async asimilarity_search_with_score(*args: Any, **kwargs: Any) → List[Tuple[Document, float]]¶

Run similarity search with distance asynchronously.

Parameters

args (Any) –
kwargs (Any) –

Return type

List[Tuple[Document, float]]

create_inverse_metadata(fields: Dict[str, Any]) → Dict[str, Any][source]¶

Create metadata from fields.

Parameters: fields (Dict[str, Any]) – The fields of the document. The fields must be a dict.
Returns: The metadata of the document. The metadata must be a dict.
Return type: metadata

create_results(json_result: Dict[str, Any]) → List[Document][source]¶

Assemble documents.

Parameters: json_result (Dict[str, Any]) –
Return type: List[Document]

create_results_with_score(json_result: Dict[str, Any]) → List[Tuple[Document, float]][source]¶

Parsing the returned results with scores. :param json_result: Results from OpenSearch query.

Returns: Results with scores.
Return type: query_result_list
Parameters: json_result (Dict[str, Any]) –

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

Delete by vector ID or other criteria.

Parameters

ids (Optional[List[str]]) – List of ids to delete.
**kwargs (Any) – Other keyword arguments that subclasses might use.

Returns

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

Return type

Optional[bool]

delete_documents_with_document_id(id_list: List[str]) → bool[source]¶

Delete documents based on their IDs.

Parameters: id_list (List[str]) – List of document IDs.
Returns: Whether the deletion was successful or not.
Return type: bool

delete_documents_with_texts(texts: List[str]) → bool[source]¶

Delete documents based on their page content.

Parameters: texts (List[str]) – List of document page content.
Returns: Whether the deletion was successful or not.
Return type: bool

classmethod from_documents(documents: List[Document], embedding: Embeddings, config: Optional[AlibabaCloudOpenSearchSettings] = None, **kwargs: Any) → AlibabaCloudOpenSearch[source]¶

Create alibaba cloud opensearch vector store instance.

Parameters

documents (List[Document]) – Documents to be inserted into the vector storage, should not be empty.
embedding (Embeddings) – Embedding function, Embedding function.
config (Optional[AlibabaCloudOpenSearchSettings]) – Alibaba OpenSearch instance configuration.
ids – Specify the ID for the inserted document. If left empty, the ID will be automatically generated based on the text content.
kwargs (Any) –

Returns

Alibaba cloud opensearch vector store instance.

Return type

AlibabaCloudOpenSearch

classmethod from_texts(texts: List[str], embedding: Embeddings, metadatas: Optional[List[dict]] = None, config: Optional[AlibabaCloudOpenSearchSettings] = None, **kwargs: Any) → AlibabaCloudOpenSearch[source]¶

Create alibaba cloud opensearch vector store instance.

Parameters

texts (List[str]) – The text segments to be inserted into the vector storage, should not be empty.
embedding (Embeddings) – Embedding function, Embedding function.
config (Optional[AlibabaCloudOpenSearchSettings]) – Alibaba OpenSearch instance configuration.
metadatas (Optional[List[dict]]) – Metadata information.
kwargs (Any) –

Returns

Alibaba cloud opensearch vector store instance.

Return type

AlibabaCloudOpenSearch

inner_embedding_query(embedding: List[float], search_filter: Optional[Dict[str, Any]] = None, k: int = 4) → Dict[str, Any][source]¶

Parameters

embedding (List[float]) –
search_filter (Optional[Dict[str, Any]]) –
k (int) –

Return type

Dict[str, Any]

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 (str) – Text to look up documents similar to.
k (int) – Number of Documents to return. Defaults to 4.
fetch_k (int) – Number of Documents to fetch to pass to MMR algorithm.
lambda_mult (float) – 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.
kwargs (Any) –

Returns

List of Documents selected by maximal marginal relevance.

Return type

List[Document]

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 (List[float]) – Embedding to look up documents similar to.
k (int) – Number of Documents to return. Defaults to 4.
fetch_k (int) – Number of Documents to fetch to pass to MMR algorithm.
lambda_mult (float) – 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.
kwargs (Any) –

Returns

List of Documents selected by maximal marginal relevance.

Return type

List[Document]

search(query: str, search_type: str, **kwargs: Any) → List[Document]¶

Return docs most similar to query using specified search type.

Parameters

query (str) –
search_type (str) –
kwargs (Any) –

Return type

List[Document]

similarity_search(query: str, k: int = 4, search_filter: Optional[Dict[str, Any]] = None, **kwargs: Any) → List[Document][source]¶

Perform similarity retrieval based on text. :param query: Vectorize text for retrieval.，should not be empty. :param k: top n. :param search_filter: Additional filtering conditions.

Returns

List of documents.

Return type

document_list

Parameters

query (str) –
k (int) –
search_filter (Optional[Dict[str, Any]]) –
kwargs (Any) –

similarity_search_by_vector(embedding: List[float], k: int = 4, search_filter: Optional[dict] = None, **kwargs: Any) → List[Document][source]¶

Perform retrieval directly using vectors. :param embedding: vectors. :param k: top n. :param search_filter: Additional filtering conditions.

Returns

List of documents.

Return type

document_list

Parameters

embedding (List[float]) –
k (int) –
search_filter (Optional[dict]) –
kwargs (Any) –

similarity_search_with_relevance_scores(query: str, k: int = 4, search_filter: Optional[dict] = None, **kwargs: Any) → List[Tuple[Document, float]][source]¶

Perform similarity retrieval based on text with scores. :param query: Vectorize text for retrieval.，should not be empty. :param k: top n. :param search_filter: Additional filtering conditions.

Returns

List of documents.

Return type

document_list

Parameters

query (str) –
k (int) –
search_filter (Optional[dict]) –
kwargs (Any) –

similarity_search_with_score(*args: Any, **kwargs: Any) → List[Tuple[Document, float]]¶

Run similarity search with distance.

Parameters

args (Any) –
kwargs (Any) –

Return type

List[Tuple[Document, float]]

Examples using AlibabaCloudOpenSearch¶

langchain_community.vectorstores.alibabacloud_opensearch.AlibabaCloudOpenSearch¶

Examples using AlibabaCloudOpenSearch¶

`langchain_community.vectorstores.alibabacloud_opensearch`.AlibabaCloudOpenSearch¶