import logging
from typing import Dict, Iterable, List, Optional
import aiohttp
from langchain_core.embeddings import Embeddings
from langchain_core.pydantic_v1 import (
BaseModel,
Field,
SecretStr,
root_validator,
)
from langchain_core.utils import secret_from_env
from pinecone import Pinecone as PineconeClient # type: ignore
logger = logging.getLogger(__name__)
DEFAULT_BATCH_SIZE = 64
[docs]class PineconeEmbeddings(BaseModel, Embeddings):
"""PineconeEmbeddings embedding model.
Example:
.. code-block:: python
from langchain_pinecone import PineconeEmbeddings
model = PineconeEmbeddings(model="multilingual-e5-large")
"""
# Clients
_client: PineconeClient = Field(default=None, exclude=True)
_async_client: aiohttp.ClientSession = Field(default=None, exclude=True)
model: str
"""Model to use for example 'multilingual-e5-large'."""
# Config
batch_size: Optional[int] = None
"""Batch size for embedding documents."""
query_params: Dict = Field(default_factory=dict)
"""Parameters for embedding query."""
document_params: Dict = Field(default_factory=dict)
"""Parameters for embedding document"""
#
dimension: Optional[int] = None
#
show_progress_bar: bool = False
pinecone_api_key: Optional[SecretStr] = Field(
default_factory=secret_from_env(
"PINECONE_API_KEY",
error_message="Pinecone API key not found. Please set the PINECONE_API_KEY "
"environment variable or pass it via `pinecone_api_key`.",
),
alias="api_key",
)
"""Pinecone API key.
If not provided, will look for the PINECONE_API_KEY environment variable."""
class Config:
extra = "forbid"
allow_population_by_field_name = True
@root_validator(pre=True)
def set_default_config(cls, values: dict) -> dict:
"""Set default configuration based on model."""
default_config_map = {
"multilingual-e5-large": {
"batch_size": 96,
"query_params": {"input_type": "query", "truncation": "END"},
"document_params": {"input_type": "passage", "truncation": "END"},
"dimension": 1024,
}
}
model = values.get("model")
if model in default_config_map:
config = default_config_map[model]
for key, value in config.items():
if key not in values:
values[key] = value
return values
@root_validator(pre=False, skip_on_failure=True)
def validate_environment(cls, values: dict) -> dict:
"""Validate that Pinecone version and credentials exist in environment."""
api_key_str = values["pinecone_api_key"].get_secret_value()
client = PineconeClient(api_key=api_key_str, source_tag="langchain")
values["_client"] = client
# initialize async client
if not values.get("_async_client"):
values["_async_client"] = aiohttp.ClientSession(
headers={
"Api-Key": api_key_str,
"Content-Type": "application/json",
"X-Pinecone-API-Version": "2024-07",
}
)
return values
def _get_batch_iterator(self, texts: List[str]) -> Iterable:
if self.batch_size is None:
batch_size = DEFAULT_BATCH_SIZE
else:
batch_size = self.batch_size
if self.show_progress_bar:
try:
from tqdm.auto import tqdm # type: ignore
except ImportError as e:
raise ImportError(
"Must have tqdm installed if `show_progress_bar` is set to True. "
"Please install with `pip install tqdm`."
) from e
_iter = tqdm(range(0, len(texts), batch_size))
else:
_iter = range(0, len(texts), batch_size)
return _iter
[docs] def embed_documents(self, texts: List[str]) -> List[List[float]]:
"""Embed search docs."""
embeddings: List[List[float]] = []
_iter = self._get_batch_iterator(texts)
for i in _iter:
response = self._client.inference.embed(
model=self.model,
parameters=self.document_params,
inputs=texts[i : i + self.batch_size],
)
embeddings.extend([r["values"] for r in response])
return embeddings
[docs] async def aembed_documents(self, texts: List[str]) -> List[List[float]]:
embeddings: List[List[float]] = []
_iter = self._get_batch_iterator(texts)
for i in _iter:
response = await self._aembed_texts(
model=self.model,
parameters=self.document_params,
texts=texts[i : i + self.batch_size],
)
embeddings.extend([r["values"] for r in response["data"]])
return embeddings
[docs] def embed_query(self, text: str) -> List[float]:
"""Embed query text."""
return self._client.inference.embed(
model=self.model, parameters=self.query_params, inputs=[text]
)[0]["values"]
[docs] async def aembed_query(self, text: str) -> List[float]:
"""Asynchronously embed query text."""
response = await self._aembed_texts(
model=self.model,
parameters=self.document_params,
texts=[text],
)
return response["data"][0]["values"]
async def _aembed_texts(
self, texts: List[str], model: str, parameters: dict
) -> Dict:
data = {
"model": model,
"inputs": [{"text": text} for text in texts],
"parameters": parameters,
}
async with self._async_client.post(
"https://api.pinecone.io/embed", json=data
) as response:
response_data = await response.json(content_type=None)
return response_data
