mirror of
https://github.com/hwchase17/langchain
synced 2024-11-10 01:10:59 +00:00
3ecb903d49
Description : * Tidy up, add missing docstring and fix unused params * Enable using session token
330 lines
12 KiB
Python
330 lines
12 KiB
Python
from __future__ import annotations
|
|
|
|
import logging
|
|
import os
|
|
import traceback
|
|
import uuid
|
|
from concurrent.futures import ThreadPoolExecutor
|
|
from typing import Any, Iterable, List, Optional, Tuple
|
|
|
|
import requests
|
|
from langchain_core.documents import Document
|
|
from langchain_core.embeddings import Embeddings
|
|
from langchain_core.vectorstores import VectorStore
|
|
|
|
logger = logging.getLogger(__name__)
|
|
|
|
|
|
class Clarifai(VectorStore):
|
|
"""`Clarifai AI` vector store.
|
|
|
|
To use, you should have the ``clarifai`` python SDK package installed.
|
|
|
|
Example:
|
|
.. code-block:: python
|
|
|
|
from langchain_community.vectorstores import Clarifai
|
|
|
|
clarifai_vector_db = Clarifai(
|
|
user_id=USER_ID,
|
|
app_id=APP_ID,
|
|
number_of_docs=NUMBER_OF_DOCS,
|
|
)
|
|
"""
|
|
|
|
def __init__(
|
|
self,
|
|
user_id: Optional[str] = None,
|
|
app_id: Optional[str] = None,
|
|
number_of_docs: Optional[int] = 4,
|
|
pat: Optional[str] = None,
|
|
token: Optional[str] = None,
|
|
api_base: Optional[str] = "https://api.clarifai.com",
|
|
) -> None:
|
|
"""Initialize with Clarifai client.
|
|
|
|
Args:
|
|
user_id (Optional[str], optional): User ID. Defaults to None.
|
|
app_id (Optional[str], optional): App ID. Defaults to None.
|
|
pat (Optional[str], optional): Personal access token. Defaults to None.
|
|
token (Optional[str], optional): Session token. Defaults to None.
|
|
number_of_docs (Optional[int], optional): Number of documents to return
|
|
during vector search. Defaults to None.
|
|
api_base (Optional[str], optional): API base. Defaults to None.
|
|
|
|
Raises:
|
|
ValueError: If user ID, app ID or personal access token is not provided.
|
|
"""
|
|
_user_id = user_id or os.environ.get("CLARIFAI_USER_ID")
|
|
_app_id = app_id or os.environ.get("CLARIFAI_APP_ID")
|
|
if _user_id is None or _app_id is None:
|
|
raise ValueError(
|
|
"Could not find CLARIFAI_USER_ID "
|
|
"or CLARIFAI_APP_ID in your environment. "
|
|
"Please set those env variables with a valid user ID, app ID"
|
|
)
|
|
self._number_of_docs = number_of_docs
|
|
|
|
try:
|
|
from clarifai.client.search import Search
|
|
except ImportError as e:
|
|
raise ImportError(
|
|
"Could not import clarifai python package. "
|
|
"Please install it with `pip install clarifai`."
|
|
) from e
|
|
|
|
self._auth = Search(
|
|
user_id=_user_id,
|
|
app_id=_app_id,
|
|
top_k=number_of_docs,
|
|
pat=pat,
|
|
token=token,
|
|
base_url=api_base,
|
|
).auth_helper
|
|
|
|
def add_texts(
|
|
self,
|
|
texts: Iterable[str],
|
|
metadatas: Optional[List[dict]] = None,
|
|
ids: Optional[List[str]] = None,
|
|
**kwargs: Any,
|
|
) -> List[str]:
|
|
"""Add texts to the Clarifai vectorstore. This will push the text
|
|
to a Clarifai application.
|
|
Application use a base workflow that create and store embedding for each text.
|
|
Make sure you are using a base workflow that is compatible with text
|
|
(such as Language Understanding).
|
|
|
|
Args:
|
|
texts (Iterable[str]): Texts to add to the vectorstore.
|
|
metadatas (Optional[List[dict]], optional): Optional list of metadatas.
|
|
ids (Optional[List[str]], optional): Optional list of IDs.
|
|
|
|
"""
|
|
try:
|
|
from clarifai.client.input import Inputs
|
|
from google.protobuf.struct_pb2 import Struct
|
|
except ImportError as e:
|
|
raise ImportError(
|
|
"Could not import clarifai python package. "
|
|
"Please install it with `pip install clarifai`."
|
|
) from e
|
|
|
|
ltexts = list(texts)
|
|
length = len(ltexts)
|
|
assert length > 0, "No texts provided to add to the vectorstore."
|
|
|
|
if metadatas is not None:
|
|
assert length == len(
|
|
metadatas
|
|
), "Number of texts and metadatas should be the same."
|
|
|
|
if ids is not None:
|
|
assert len(ltexts) == len(
|
|
ids
|
|
), "Number of text inputs and input ids should be the same."
|
|
|
|
input_obj = Inputs.from_auth_helper(auth=self._auth)
|
|
batch_size = 32
|
|
input_job_ids = []
|
|
for idx in range(0, length, batch_size):
|
|
try:
|
|
batch_texts = ltexts[idx : idx + batch_size]
|
|
batch_metadatas = (
|
|
metadatas[idx : idx + batch_size] if metadatas else None
|
|
)
|
|
if ids is None:
|
|
batch_ids = [uuid.uuid4().hex for _ in range(len(batch_texts))]
|
|
else:
|
|
batch_ids = ids[idx : idx + batch_size]
|
|
if batch_metadatas is not None:
|
|
meta_list = []
|
|
for meta in batch_metadatas:
|
|
meta_struct = Struct()
|
|
meta_struct.update(meta)
|
|
meta_list.append(meta_struct)
|
|
input_batch = [
|
|
input_obj.get_text_input(
|
|
input_id=batch_ids[i],
|
|
raw_text=text,
|
|
metadata=meta_list[i] if batch_metadatas else None,
|
|
)
|
|
for i, text in enumerate(batch_texts)
|
|
]
|
|
result_id = input_obj.upload_inputs(inputs=input_batch)
|
|
input_job_ids.extend(result_id)
|
|
logger.debug("Input posted successfully.")
|
|
|
|
except Exception as error:
|
|
logger.warning(f"Post inputs failed: {error}")
|
|
traceback.print_exc()
|
|
|
|
return input_job_ids
|
|
|
|
def similarity_search_with_score(
|
|
self,
|
|
query: str,
|
|
k: Optional[int] = None,
|
|
filters: Optional[dict] = None,
|
|
**kwargs: Any,
|
|
) -> List[Tuple[Document, float]]:
|
|
"""Run similarity search with score using Clarifai.
|
|
|
|
Args:
|
|
query (str): Query text to search for.
|
|
k (Optional[int]): Number of results to return. If not set,
|
|
it'll take _number_of_docs. Defaults to None.
|
|
filter (Optional[Dict[str, str]]): Filter by metadata.
|
|
Defaults to None.
|
|
|
|
Returns:
|
|
List[Document]: List of documents most similar to the query text.
|
|
"""
|
|
try:
|
|
from clarifai.client.search import Search
|
|
from clarifai_grpc.grpc.api import resources_pb2
|
|
from google.protobuf import json_format # type: ignore
|
|
except ImportError as e:
|
|
raise ImportError(
|
|
"Could not import clarifai python package. "
|
|
"Please install it with `pip install clarifai`."
|
|
) from e
|
|
|
|
# Get number of docs to return
|
|
top_k = k or self._number_of_docs
|
|
|
|
search_obj = Search.from_auth_helper(auth=self._auth, top_k=top_k)
|
|
rank = [{"text_raw": query}]
|
|
# Add filter by metadata if provided.
|
|
if filters is not None:
|
|
search_metadata = {"metadata": filters}
|
|
search_response = search_obj.query(ranks=rank, filters=[search_metadata])
|
|
else:
|
|
search_response = search_obj.query(ranks=rank)
|
|
|
|
# Retrieve hits
|
|
hits = [hit for data in search_response for hit in data.hits]
|
|
executor = ThreadPoolExecutor(max_workers=10)
|
|
|
|
def hit_to_document(hit: resources_pb2.Hit) -> Tuple[Document, float]:
|
|
metadata = json_format.MessageToDict(hit.input.data.metadata)
|
|
h = dict(self._auth.metadata)
|
|
request = requests.get(hit.input.data.text.url, headers=h)
|
|
|
|
# override encoding by real educated guess as provided by chardet
|
|
request.encoding = request.apparent_encoding
|
|
requested_text = request.text
|
|
|
|
logger.debug(
|
|
f"\tScore {hit.score:.2f} for annotation: {hit.annotation.id}\
|
|
off input: {hit.input.id}, text: {requested_text[:125]}"
|
|
)
|
|
return (Document(page_content=requested_text, metadata=metadata), hit.score)
|
|
|
|
# Iterate over hits and retrieve metadata and text
|
|
futures = [executor.submit(hit_to_document, hit) for hit in hits]
|
|
docs_and_scores = [future.result() for future in futures]
|
|
|
|
return docs_and_scores
|
|
|
|
def similarity_search(
|
|
self,
|
|
query: str,
|
|
k: Optional[int] = None,
|
|
**kwargs: Any,
|
|
) -> List[Document]:
|
|
"""Run similarity search using Clarifai.
|
|
|
|
Args:
|
|
query: Text to look up documents similar to.
|
|
k: Number of Documents to return.
|
|
If not set, it'll take _number_of_docs. Defaults to None.
|
|
|
|
Returns:
|
|
List of Documents most similar to the query and score for each
|
|
"""
|
|
docs_and_scores = self.similarity_search_with_score(query, k=k, **kwargs)
|
|
return [doc for doc, _ in docs_and_scores]
|
|
|
|
@classmethod
|
|
def from_texts(
|
|
cls,
|
|
texts: List[str],
|
|
embedding: Optional[Embeddings] = None,
|
|
metadatas: Optional[List[dict]] = None,
|
|
user_id: Optional[str] = None,
|
|
app_id: Optional[str] = None,
|
|
number_of_docs: Optional[int] = None,
|
|
pat: Optional[str] = None,
|
|
token: Optional[str] = None,
|
|
**kwargs: Any,
|
|
) -> Clarifai:
|
|
"""Create a Clarifai vectorstore from a list of texts.
|
|
|
|
Args:
|
|
user_id (str): User ID.
|
|
app_id (str): App ID.
|
|
texts (List[str]): List of texts to add.
|
|
number_of_docs (Optional[int]): Number of documents
|
|
to return during vector search. Defaults to None.
|
|
pat (Optional[str], optional): Personal access token.
|
|
Defaults to None.
|
|
token (Optional[str], optional): Session token. Defaults to None.
|
|
metadatas (Optional[List[dict]]): Optional list
|
|
of metadatas. Defaults to None.
|
|
**kwargs: Additional keyword arguments to be passed to the Search.
|
|
|
|
Returns:
|
|
Clarifai: Clarifai vectorstore.
|
|
"""
|
|
clarifai_vector_db = cls(
|
|
user_id=user_id,
|
|
app_id=app_id,
|
|
number_of_docs=number_of_docs,
|
|
pat=pat,
|
|
token=token,
|
|
**kwargs,
|
|
)
|
|
clarifai_vector_db.add_texts(texts=texts, metadatas=metadatas)
|
|
return clarifai_vector_db
|
|
|
|
@classmethod
|
|
def from_documents(
|
|
cls,
|
|
documents: List[Document],
|
|
embedding: Optional[Embeddings] = None,
|
|
user_id: Optional[str] = None,
|
|
app_id: Optional[str] = None,
|
|
number_of_docs: Optional[int] = None,
|
|
pat: Optional[str] = None,
|
|
token: Optional[str] = None,
|
|
**kwargs: Any,
|
|
) -> Clarifai:
|
|
"""Create a Clarifai vectorstore from a list of documents.
|
|
|
|
Args:
|
|
user_id (str): User ID.
|
|
app_id (str): App ID.
|
|
documents (List[Document]): List of documents to add.
|
|
number_of_docs (Optional[int]): Number of documents
|
|
to return during vector search. Defaults to None.
|
|
pat (Optional[str], optional): Personal access token. Defaults to None.
|
|
token (Optional[str], optional): Session token. Defaults to None.
|
|
**kwargs: Additional keyword arguments to be passed to the Search.
|
|
|
|
Returns:
|
|
Clarifai: Clarifai vectorstore.
|
|
"""
|
|
texts = [doc.page_content for doc in documents]
|
|
metadatas = [doc.metadata for doc in documents]
|
|
return cls.from_texts(
|
|
user_id=user_id,
|
|
app_id=app_id,
|
|
texts=texts,
|
|
number_of_docs=number_of_docs,
|
|
pat=pat,
|
|
metadatas=metadatas,
|
|
token=token,
|
|
**kwargs,
|
|
)
|