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import json
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import json
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import os
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from typing import Any, Dict, List, Optional
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from typing import Any, Dict, List, Optional
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from langchain_core._api import deprecated
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from langchain_core._api import deprecated
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from langchain_core.embeddings import Embeddings
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from langchain_core.embeddings import Embeddings
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from langchain_core.pydantic_v1 import BaseModel, Extra, root_validator
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from langchain_core.pydantic_v1 import BaseModel, Extra, root_validator
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from langchain_core.utils import get_from_dict_or_env
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DEFAULT_MODEL = "sentence-transformers/all-mpnet-base-v2"
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DEFAULT_MODEL = "sentence-transformers/all-mpnet-base-v2"
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VALID_TASKS = ("feature-extraction",)
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VALID_TASKS = ("feature-extraction",)
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@ -52,19 +52,19 @@ class HuggingFaceHubEmbeddings(BaseModel, Embeddings):
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extra = Extra.forbid
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extra = Extra.forbid
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@root_validator()
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@root_validator(pre=True)
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def validate_environment(cls, values: Dict) -> Dict:
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def validate_environment(cls, values: Dict) -> Dict:
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"""Validate that api key and python package exists in environment."""
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"""Validate that api key and python package exists in environment."""
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huggingfacehub_api_token = values["huggingfacehub_api_token"] or os.getenv(
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huggingfacehub_api_token = get_from_dict_or_env(
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"HUGGINGFACEHUB_API_TOKEN"
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values, "huggingfacehub_api_token", "HUGGINGFACEHUB_API_TOKEN"
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)
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)
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try:
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try:
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from huggingface_hub import AsyncInferenceClient, InferenceClient
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from huggingface_hub import AsyncInferenceClient, InferenceClient
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if values["model"]:
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if values.get("model"):
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values["repo_id"] = values["model"]
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values["repo_id"] = values["model"]
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elif values["repo_id"]:
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elif values.get("repo_id"):
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values["model"] = values["repo_id"]
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values["model"] = values["repo_id"]
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else:
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else:
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values["model"] = DEFAULT_MODEL
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values["model"] = DEFAULT_MODEL
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@ -80,11 +80,6 @@ class HuggingFaceHubEmbeddings(BaseModel, Embeddings):
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token=huggingfacehub_api_token,
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token=huggingfacehub_api_token,
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)
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)
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if values["task"] not in VALID_TASKS:
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raise ValueError(
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f"Got invalid task {values['task']}, "
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f"currently only {VALID_TASKS} are supported"
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)
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values["client"] = client
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values["client"] = client
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values["async_client"] = async_client
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values["async_client"] = async_client
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@ -95,6 +90,16 @@ class HuggingFaceHubEmbeddings(BaseModel, Embeddings):
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)
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)
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return values
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return values
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@root_validator(pre=False, skip_on_failure=True)
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def post_init(cls, values: Dict) -> Dict:
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"""Post init validation for the class."""
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if values["task"] not in VALID_TASKS:
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raise ValueError(
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f"Got invalid task {values['task']}, "
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f"currently only {VALID_TASKS} are supported"
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)
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return values
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def embed_documents(self, texts: List[str]) -> List[List[float]]:
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def embed_documents(self, texts: List[str]) -> List[List[float]]:
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"""Call out to HuggingFaceHub's embedding endpoint for embedding search docs.
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"""Call out to HuggingFaceHub's embedding endpoint for embedding search docs.
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