_utils.py — langchain Source File

Source Code

import os
from typing import Any

from langchain_core.utils import convert_to_secret_str
from perplexity import Perplexity


def initialize_client(values: dict[str, Any]) -> dict[str, Any]:
    """Initialize the Perplexity client."""
    pplx_api_key = (
        values.get("pplx_api_key")
        or os.environ.get("PPLX_API_KEY")
        or os.environ.get("PERPLEXITY_API_KEY")
        or ""
    )
    values["pplx_api_key"] = convert_to_secret_str(pplx_api_key)

    api_key = (
        values["pplx_api_key"].get_secret_value() if values["pplx_api_key"] else None
    )

    if not values.get("client"):
        values["client"] = Perplexity(api_key=api_key)

    return values