`langchain_community.vectorstores.aperturedb`.ApertureDB¶

class langchain_community.vectorstores.aperturedb.ApertureDB(embeddings: Embeddings, descriptor_set: str = 'langchain', dimensions: Optional[int] = None, engine: Optional[str] = None, metric: Optional[str] = None, log_level: int = 30, properties: Optional[Dict] = None, **kwargs: Any)[source]¶

Create a vectorstore backed by ApertureDB

A single ApertureDB instance can support many vectorstores, distinguished by ‘descriptor_set’ name. The descriptor set is created if it does not exist. Different descriptor sets can use different engines and metrics, be supplied by different embedding models, and have different dimensions.

See ApertureDB documentation on AddDescriptorSet https://docs.aperturedata.io/query_language/Reference/descriptor_commands/desc_set_commands/AddDescriptorSet for more information on the engine and metric options.

Parameters

embeddings (Embeddings) – Embeddings object
descriptor_set (str, optional) – Descriptor set name. Defaults to “langchain”.
dimensions (Optional[int], optional) – Number of dimensions of the embeddings. Defaults to None.
engine (str, optional) – Engine to use. Defaults to “HNSW” for new descriptorsets.
metric (str, optional) – Metric to use. Defaults to “CS” for new descriptorsets.
log_level (int, optional) – Logging level. Defaults to logging.WARN.
properties (Optional[Dict]) –
kwargs (Any) –

Attributes

embeddings

Access the query embedding object if available.

Methods

`__init__`(embeddings[, descriptor_set, ...])	Create a vectorstore backed by ApertureDB
`aadd_documents`(documents, **kwargs)	Async run more documents through the embeddings and add to the vectorstore.
`aadd_texts`(texts[, metadatas])	Async run more texts through the embeddings and add to the vectorstore.
`add_documents`(documents, **kwargs)	Add or update documents in the vectorstore.
`add_texts`(texts[, metadatas])	Run more texts through the embeddings and add to the vectorstore.
`adelete`([ids])	Async delete by vector ID or other criteria.
`afrom_documents`(documents, embedding, **kwargs)	Async return VectorStore initialized from documents and embeddings.
`afrom_texts`(texts, embedding[, metadatas])	Async return VectorStore initialized from texts and embeddings.
`aget_by_ids`(ids, /)	Async get documents by their IDs.
`amax_marginal_relevance_search`(query[, k, ...])	Async return docs selected using the maximal marginal relevance.
`amax_marginal_relevance_search_by_vector`(...)	Async return docs selected using the maximal marginal relevance.
`as_retriever`(**kwargs)	Return VectorStoreRetriever initialized from this VectorStore.
`asearch`(query, search_type, **kwargs)	Async return docs most similar to query using a specified search type.
`asimilarity_search`(query[, k])	Async return docs most similar to query.
`asimilarity_search_by_vector`(embedding[, k])	Async return docs most similar to embedding vector.
`asimilarity_search_with_relevance_scores`(query)	Async return docs and relevance scores in the range [0, 1].
`asimilarity_search_with_score`(args, *kwargs)	Async run similarity search with distance.
`astreaming_upsert`(items, /, batch_size, **kwargs)
`aupsert`(items, /, **kwargs)
`delete`([ids])	Delete documents from the vectorstore by id.
`delete_vectorstore`(descriptor_set)	Deletes a vectorstore and all its data from the database
`from_documents`(documents, embedding, **kwargs)	Creates a new vectorstore from a list of documents
`from_texts`(texts, embedding[, metadatas])	Creates a new vectorstore from a list of texts
`get_by_ids`(ids, /)	Find documents in the vectorstore by id.
`list_vectorstores`()	Returns a list of all vectorstores in the database
`max_marginal_relevance_search`(query[, k, ...])	Returns similar documents to the query that also have diversity
`max_marginal_relevance_search_by_vector`(...)	Returns similar documents to the vector that also have diversity
`search`(query, search_type, **kwargs)	Return docs most similar to query using a specified search type.
`similarity_search`(query[, k])	Search for documents similar to the query using the vectorstore
`similarity_search_by_vector`(embedding[, k])	Returns the k most similar documents to the given embedding vector
`similarity_search_with_relevance_scores`(query)	Return docs and relevance scores in the range [0, 1].
`similarity_search_with_score`(query, *args, ...)	Run similarity search with distance.
`streaming_upsert`(items, /, batch_size, **kwargs)
`upsert`(items, /, **kwargs)	Insert or update items

__init__(embeddings: Embeddings, descriptor_set: str = 'langchain', dimensions: Optional[int] = None, engine: Optional[str] = None, metric: Optional[str] = None, log_level: int = 30, properties: Optional[Dict] = None, **kwargs: Any) → None[source]¶

Create a vectorstore backed by ApertureDB

A single ApertureDB instance can support many vectorstores, distinguished by ‘descriptor_set’ name. The descriptor set is created if it does not exist. Different descriptor sets can use different engines and metrics, be supplied by different embedding models, and have different dimensions.

See ApertureDB documentation on AddDescriptorSet https://docs.aperturedata.io/query_language/Reference/descriptor_commands/desc_set_commands/AddDescriptorSet for more information on the engine and metric options.

Parameters

embeddings (Embeddings) – Embeddings object
descriptor_set (str, optional) – Descriptor set name. Defaults to “langchain”.
dimensions (Optional[int], optional) – Number of dimensions of the embeddings. Defaults to None.
engine (str, optional) – Engine to use. Defaults to “HNSW” for new descriptorsets.
metric (str, optional) – Metric to use. Defaults to “CS” for new descriptorsets.
log_level (int, optional) – Logging level. Defaults to logging.WARN.
properties (Optional[Dict]) –
kwargs (Any) –

Return type

None

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

Async run more documents through the embeddings and add to the vectorstore.

Parameters

documents (List[Document]) – Documents to add to the vectorstore.
kwargs (Any) – Additional keyword arguments.

Returns

List of IDs of the added texts.

Raises

ValueError – If the number of IDs does not match the number of documents.

Return type

List[str]

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

Async run more texts through the embeddings and add to the vectorstore.

Parameters

texts (Iterable[str]) – Iterable of strings to add to the vectorstore.
metadatas (Optional[List[dict]]) – Optional list of metadatas associated with the texts. Default is None.
**kwargs (Any) – vectorstore specific parameters.

Returns

List of ids from adding the texts into the vectorstore.

Raises

ValueError – If the number of metadatas does not match the number of texts.
ValueError – If the number of ids does not match the number of texts.

Return type

List[str]

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

Add or update documents in the vectorstore.

Parameters

documents (List[Document]) – Documents to add to the vectorstore.
kwargs (Any) – Additional keyword arguments. if kwargs contains ids and documents contain ids, the ids in the kwargs will receive precedence.

Returns

List of IDs of the added texts.

Raises

ValueError – If the number of ids does not match the number of documents.

Return type

List[str]

add_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]) – Iterable of strings to add to the vectorstore.
metadatas (Optional[List[dict]]) – Optional list of metadatas associated with the texts.
**kwargs (Any) – vectorstore specific parameters. One of the kwargs should be ids which is a list of ids associated with the texts.

Returns

List of ids from adding the texts into the vectorstore.

Raises

ValueError – If the number of metadatas does not match the number of texts.
ValueError – If the number of ids does not match the number of texts.

Return type

List[str]

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

Async delete by vector ID or other criteria.

Parameters

ids (Optional[List[str]]) – List of ids to delete. If None, delete all. Default is None.
**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¶

Async return VectorStore initialized from documents and embeddings.

Parameters

documents (List[Document]) – List of Documents to add to the vectorstore.
embedding (Embeddings) – Embedding function to use.
kwargs (Any) – Additional keyword arguments.

Returns

VectorStore initialized from documents and embeddings.

Return type

VectorStore

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

Async return VectorStore initialized from texts and embeddings.

Parameters

texts (List[str]) – Texts to add to the vectorstore.
embedding (Embeddings) – Embedding function to use.
metadatas (Optional[List[dict]]) – Optional list of metadatas associated with the texts. Default is None.
kwargs (Any) – Additional keyword arguments.

Returns

VectorStore initialized from texts and embeddings.

Return type

VectorStore

async aget_by_ids(ids: Sequence[str], /) → List[Document]¶

Async get documents by their IDs.

The returned documents are expected to have the ID field set to the ID of the document in the vector store.

Fewer documents may be returned than requested if some IDs are not found or if there are duplicated IDs.

Users should not assume that the order of the returned documents matches the order of the input IDs. Instead, users should rely on the ID field of the returned documents.

This method should NOT raise exceptions if no documents are found for some IDs.

Parameters: ids (Sequence[str]) – List of ids to retrieve.
Returns: List of Documents.
Return type: List[Document]

New in version 0.2.11.

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

Async 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. Default is 20.
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]¶

Async 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. Default is 20.
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) – Arguments to pass to the search method.

Returns

List of Documents selected by maximal marginal relevance.

Return type

List[Document]

as_retriever(**kwargs: Any) → VectorStoreRetriever¶

Return VectorStoreRetriever initialized from this VectorStore.

Parameters

**kwargs (Any) –

Keyword arguments to pass to the search function. Can include: 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]¶

Async return docs most similar to query using a specified search type.

Parameters

query (str) – Input text.
search_type (str) – Type of search to perform. Can be “similarity”, “mmr”, or “similarity_score_threshold”.
**kwargs (Any) – Arguments to pass to the search method.

Returns

List of Documents most similar to the query.

Raises

ValueError – If search_type is not one of “similarity”, “mmr”, or “similarity_score_threshold”.

Return type

List[Document]

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

Async return docs most similar to query.

Parameters

query (str) – Input text.
k (int) – Number of Documents to return. Defaults to 4.
**kwargs (Any) – Arguments to pass to the search method.

Returns

List of Documents most similar to the query.

Return type

List[Document]

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

Async return docs most similar to embedding vector.

Parameters

embedding (List[float]) – Embedding to look up documents similar to.
k (int) – Number of Documents to return. Defaults to 4.
**kwargs (Any) – Arguments to pass to the search method.

Returns

List of Documents most similar to the query vector.

Return type

List[Document]

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

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

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]]¶

Async run similarity search with distance.

Parameters

*args (Any) – Arguments to pass to the search method.
**kwargs (Any) – Arguments to pass to the search method.

Returns

List of Tuples of (doc, similarity_score).

Return type

List[Tuple[Document, float]]

astreaming_upsert(items: AsyncIterable[Document], /, batch_size: int, **kwargs: Any) → AsyncIterator[UpsertResponse]¶

Beta

Added in 0.2.11. The API is subject to change.

Upsert documents in a streaming fashion. Async version of streaming_upsert.

Parameters

items (AsyncIterable[Document]) – Iterable of Documents to add to the vectorstore.
batch_size (int) – The size of each batch to upsert.
kwargs (Any) – Additional keyword arguments. kwargs should only include parameters that are common to all documents. (e.g., timeout for indexing, retry policy, etc.) kwargs should not include ids to avoid ambiguous semantics. Instead the ID should be provided as part of the Document object.

Yields

UpsertResponse – A response object that contains the list of IDs that were successfully added or updated in the vectorstore and the list of IDs that failed to be added or updated.

Return type

AsyncIterator[UpsertResponse]

New in version 0.2.11.

async aupsert(items: Sequence[Document], /, **kwargs: Any) → UpsertResponse¶

Beta

Added in 0.2.11. The API is subject to change.

Add or update documents in the vectorstore. Async version of upsert.

The upsert functionality should utilize the ID field of the Document object if it is provided. If the ID is not provided, the upsert method is free to generate an ID for the document.

When an ID is specified and the document already exists in the vectorstore, the upsert method should update the document with the new data. If the document does not exist, the upsert method should add the document to the vectorstore.

Parameters

items (Sequence[Document]) – Sequence of Documents to add to the vectorstore.
kwargs (Any) – Additional keyword arguments.

Returns

A response object that contains the list of IDs that were successfully added or updated in the vectorstore and the list of IDs that failed to be added or updated.

Return type

UpsertResponse

New in version 0.2.11.

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

Delete documents from the vectorstore by id.

Parameters

ids (Optional[List[str]]) – List of ids to delete from the vectorstore.
kwargs (Any) –

Returns

True if the deletion was successful, False otherwise

Return type

Optional[bool]

classmethod delete_vectorstore(descriptor_set: str) → None[source]¶

Deletes a vectorstore and all its data from the database

Parameters: descriptor_set (str) – The name of the descriptor set to delete
Return type: None

classmethod from_documents(documents: List[Document], embedding: Embeddings, **kwargs: Any) → ApertureDB[source]¶

Creates a new vectorstore from a list of documents

Parameters

documents (List[Document]) – List of Document objects
embedding (Embeddings) – Embeddings object as for constructing the vectorstore
metadatas – Optional list of metadatas associated with the texts.
kwargs (Any) – Additional arguments to pass to the constructor

Return type

ApertureDB

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

Creates a new vectorstore from a list of texts

Parameters

texts (List[str]) – List of text strings
embedding (Embeddings) – Embeddings object as for constructing the vectorstore
metadatas (Optional[List[dict]]) – Optional list of metadatas associated with the texts.
kwargs (Any) – Additional arguments to pass to the constructor

Return type

ApertureDB

get_by_ids(ids: Sequence[str], /) → List[Document][source]¶

Find documents in the vectorstore by id.

Parameters: ids (Sequence[str]) – List of ids to find in the vectorstore.
Returns: List of Document objects found in the vectorstore.
Return type: documents

classmethod list_vectorstores() → None[source]¶

Returns a list of all vectorstores in the database

Returns: List of descriptor sets with properties
Return type: None

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

Returns similar documents to the query that also have diversity

This algorithm balances relevance and diversity in the search results.

Parameters

query (str) – Query string to search for.
k (int) – Number of results to return.
fetch_k (int) – Number of results to fetch.
lambda_mult (float) – Lambda multiplier for MMR.
kwargs (Any) –

Returns

List of Document objects ordered by decreasing similarity/diversty.

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][source]¶

Returns similar documents to the vector that also have diversity

This algorithm balances relevance and diversity in the search results.

Parameters

embedding (List[float]) – Embedding vector to search for.
k (int) – Number of results to return.
fetch_k (int) – Number of results to fetch.
lambda_mult (float) – Lambda multiplier for MMR.
kwargs (Any) –

Returns

List of Document objects ordered by decreasing similarity/diversty.

Return type

List[Document]

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

Return docs most similar to query using a specified search type.

Parameters

query (str) – Input text
search_type (str) – Type of search to perform. Can be “similarity”, “mmr”, or “similarity_score_threshold”.
**kwargs (Any) – Arguments to pass to the search method.

Returns

List of Documents most similar to the query.

Raises

ValueError – If search_type is not one of “similarity”, “mmr”, or “similarity_score_threshold”.

Return type

List[Document]

similarity_search(query: str, k: int = 4, *args: Any, **kwargs: Any) → List[Document][source]¶

Search for documents similar to the query using the vectorstore

Parameters

query (str) – Query string to search for.
k (int) – Number of results to return.
args (Any) –
kwargs (Any) –

Returns

List of Document objects ordered by decreasing similarity to the query.

Return type

List[Document]

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

Returns the k most similar documents to the given embedding vector

Parameters

embedding (List[float]) – The embedding vector to search for
k (int) – The number of similar documents to return
kwargs (Any) –

Returns

List of Document objects ordered by decreasing similarity to the query.

Return type

List[Document]

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 (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]]

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

Run similarity search with distance.

Parameters

*args (Any) – Arguments to pass to the search method.
**kwargs (Any) – Arguments to pass to the search method.
query (str) –
*args –
**kwargs –

Returns

List of Tuples of (doc, similarity_score).

Return type

List[Tuple[Document, float]]

streaming_upsert(items: Iterable[Document], /, batch_size: int, **kwargs: Any) → Iterator[UpsertResponse]¶

Beta

Added in 0.2.11. The API is subject to change.

Upsert documents in a streaming fashion.

Parameters

items (Iterable[Document]) – Iterable of Documents to add to the vectorstore.
batch_size (int) – The size of each batch to upsert.
kwargs (Any) – Additional keyword arguments. kwargs should only include parameters that are common to all documents. (e.g., timeout for indexing, retry policy, etc.) kwargs should not include ids to avoid ambiguous semantics. Instead, the ID should be provided as part of the Document object.

Yields

UpsertResponse – A response object that contains the list of IDs that were successfully added or updated in the vectorstore and the list of IDs that failed to be added or updated.

Return type

Iterator[UpsertResponse]

New in version 0.2.11.

upsert(items: Sequence[Document], /, **kwargs: Any) → UpsertResponse[source]¶

Insert or update items

Updating documents is dependent on the documents’ id attribute.

Parameters

items (Sequence[Document]) – List of Document objects to upsert
kwargs (Any) –

Returns

UpsertResponse object with succeeded and failed

Return type

UpsertResponse

langchain_community.vectorstores.aperturedb.ApertureDB¶

`langchain_community.vectorstores.aperturedb`.ApertureDB¶