langchain/libs/community/langchain_community/tools/google_search/tool.py

"""Tool for the Google search API."""

from typing import Optional

from langchain_core.callbacks import CallbackManagerForToolRun
from langchain_core.tools import BaseTool

from langchain_community.utilities.google_search import GoogleSearchAPIWrapper


class GoogleSearchRun(BaseTool):
    """Tool that queries the Google search API."""

    name: str = "google_search"
    description: str = (
        "A wrapper around Google Search. "
        "Useful for when you need to answer questions about current events. "
        "Input should be a search query."
    )
    api_wrapper: GoogleSearchAPIWrapper

    def _run(
        self,
        query: str,
        run_manager: Optional[CallbackManagerForToolRun] = None,
    ) -> str:
        """Use the tool."""
        return self.api_wrapper.run(query)


class GoogleSearchResults(BaseTool):
    """Tool that queries the Google Search API and gets back json."""

    name: str = "google_search_results_json"
    description: str = (
        "A wrapper around Google Search. "
        "Useful for when you need to answer questions about current events. "
        "Input should be a search query. Output is a JSON array of the query results"
    )
    num_results: int = 4
    api_wrapper: GoogleSearchAPIWrapper

    def _run(
        self,
        query: str,
        run_manager: Optional[CallbackManagerForToolRun] = None,
    ) -> str:
        """Use the tool."""
        return str(self.api_wrapper.results(query, self.num_results))