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# flake8: noqa
"""Load tools."""
from typing import Any, List, Optional
from langchain.agents.tools import Tool
from langchain.callbacks.base import BaseCallbackManager
from langchain.chains.api import news_docs, open_meteo_docs, tmdb_docs, podcast_docs
from langchain.chains.api.base import APIChain
from langchain.chains.llm_math.base import LLMMathChain
from langchain.chains.pal.base import PALChain
from langchain.llms.base import BaseLLM
from langchain.requests import RequestsWrapper
from langchain.tools.base import BaseTool
from langchain.tools.bing_search.tool import BingSearchRun
from langchain.tools.google_search.tool import GoogleSearchResults, GoogleSearchRun
from langchain.tools.human.tool import HumanInputRun
from langchain.tools.python.tool import PythonREPLTool
from langchain.tools.requests.tool import RequestsGetTool
from langchain.tools.wikipedia.tool import WikipediaQueryRun
from langchain.tools.wolfram_alpha.tool import WolframAlphaQueryRun
from langchain.utilities.bash import BashProcess
from langchain.utilities.bing_search import BingSearchAPIWrapper
from langchain.utilities.google_search import GoogleSearchAPIWrapper
from langchain.utilities.google_serper import GoogleSerperAPIWrapper
from langchain.utilities.searx_search import SearxSearchWrapper
from langchain.utilities.serpapi import SerpAPIWrapper
from langchain.utilities.wikipedia import WikipediaAPIWrapper
from langchain.utilities.wolfram_alpha import WolframAlphaAPIWrapper
def _get_python_repl() -> BaseTool:
return PythonREPLTool()
def _get_requests() -> BaseTool:
return RequestsGetTool(requests_wrapper=RequestsWrapper())
def _get_terminal() -> BaseTool:
return Tool(
name="Terminal",
description="Executes commands in a terminal. Input should be valid commands, and the output will be any output from running that command.",
func=BashProcess().run,
)
_BASE_TOOLS = {
"python_repl": _get_python_repl,
"requests": _get_requests,
"terminal": _get_terminal,
}
def _get_pal_math(llm: BaseLLM) -> BaseTool:
return Tool(
name="PAL-MATH",
description="A language model that is really good at solving complex word math problems. Input should be a fully worded hard word math problem.",
func=PALChain.from_math_prompt(llm).run,
)
def _get_pal_colored_objects(llm: BaseLLM) -> BaseTool:
return Tool(
name="PAL-COLOR-OBJ",
description="A language model that is really good at reasoning about position and the color attributes of objects. Input should be a fully worded hard reasoning problem. Make sure to include all information about the objects AND the final question you want to answer.",
func=PALChain.from_colored_object_prompt(llm).run,
)
def _get_llm_math(llm: BaseLLM) -> BaseTool:
return Tool(
name="Calculator",
description="Useful for when you need to answer questions about math.",
func=LLMMathChain(llm=llm, callback_manager=llm.callback_manager).run,
coroutine=LLMMathChain(llm=llm, callback_manager=llm.callback_manager).arun,
)
def _get_open_meteo_api(llm: BaseLLM) -> BaseTool:
chain = APIChain.from_llm_and_api_docs(llm, open_meteo_docs.OPEN_METEO_DOCS)
return Tool(
name="Open Meteo API",
description="Useful for when you want to get weather information from the OpenMeteo API. The input should be a question in natural language that this API can answer.",
func=chain.run,
)
_LLM_TOOLS = {
"pal-math": _get_pal_math,
"pal-colored-objects": _get_pal_colored_objects,
"llm-math": _get_llm_math,
"open-meteo-api": _get_open_meteo_api,
}
def _get_news_api(llm: BaseLLM, **kwargs: Any) -> BaseTool:
news_api_key = kwargs["news_api_key"]
chain = APIChain.from_llm_and_api_docs(
llm, news_docs.NEWS_DOCS, headers={"X-Api-Key": news_api_key}
)
return Tool(
name="News API",
description="Use this when you want to get information about the top headlines of current news stories. The input should be a question in natural language that this API can answer.",
func=chain.run,
)
def _get_tmdb_api(llm: BaseLLM, **kwargs: Any) -> BaseTool:
tmdb_bearer_token = kwargs["tmdb_bearer_token"]
chain = APIChain.from_llm_and_api_docs(
llm,
tmdb_docs.TMDB_DOCS,
headers={"Authorization": f"Bearer {tmdb_bearer_token}"},
)
return Tool(
name="TMDB API",
description="Useful for when you want to get information from The Movie Database. The input should be a question in natural language that this API can answer.",
func=chain.run,
)
def _get_podcast_api(llm: BaseLLM, **kwargs: Any) -> BaseTool:
listen_api_key = kwargs["listen_api_key"]
chain = APIChain.from_llm_and_api_docs(
llm,
podcast_docs.PODCAST_DOCS,
headers={"X-ListenAPI-Key": listen_api_key},
)
return Tool(
name="Podcast API",
description="Use the Listen Notes Podcast API to search all podcasts or episodes. The input should be a question in natural language that this API can answer.",
func=chain.run,
)
def _get_wolfram_alpha(**kwargs: Any) -> BaseTool:
return WolframAlphaQueryRun(api_wrapper=WolframAlphaAPIWrapper(**kwargs))
def _get_google_search(**kwargs: Any) -> BaseTool:
return GoogleSearchRun(api_wrapper=GoogleSearchAPIWrapper(**kwargs))
def _get_wikipedia(**kwargs: Any) -> BaseTool:
return WikipediaQueryRun(api_wrapper=WikipediaAPIWrapper(**kwargs))
def _get_google_serper(**kwargs: Any) -> BaseTool:
return Tool(
name="Serper Search",
func=GoogleSerperAPIWrapper(**kwargs).run,
description="A low-cost Google Search API. Useful for when you need to answer questions about current events. Input should be a search query.",
)
def _get_google_search_results_json(**kwargs: Any) -> BaseTool:
return GoogleSearchResults(api_wrapper=GoogleSearchAPIWrapper(**kwargs))
def _get_serpapi(**kwargs: Any) -> BaseTool:
return Tool(
name="Search",
description="A search engine. Useful for when you need to answer questions about current events. Input should be a search query.",
func=SerpAPIWrapper(**kwargs).run,
coroutine=SerpAPIWrapper(**kwargs).arun,
)
def _get_searx_search(**kwargs: Any) -> BaseTool:
return Tool(
name="SearX Search",
description="A meta search engine. Useful for when you need to answer questions about current events. Input should be a search query.",
func=SearxSearchWrapper(**kwargs).run,
)
def _get_bing_search(**kwargs: Any) -> BaseTool:
return BingSearchRun(api_wrapper=BingSearchAPIWrapper(**kwargs))
def _get_human_tool(**kwargs: Any) -> BaseTool:
return HumanInputRun(**kwargs)
_EXTRA_LLM_TOOLS = {
"news-api": (_get_news_api, ["news_api_key"]),
"tmdb-api": (_get_tmdb_api, ["tmdb_bearer_token"]),
"podcast-api": (_get_podcast_api, ["listen_api_key"]),
}
_EXTRA_OPTIONAL_TOOLS = {
"wolfram-alpha": (_get_wolfram_alpha, ["wolfram_alpha_appid"]),
"google-search": (_get_google_search, ["google_api_key", "google_cse_id"]),
"google-search-results-json": (
_get_google_search_results_json,
["google_api_key", "google_cse_id", "num_results"],
),
"bing-search": (_get_bing_search, ["bing_subscription_key", "bing_search_url"]),
"google-serper": (_get_google_serper, ["serper_api_key"]),
"serpapi": (_get_serpapi, ["serpapi_api_key", "aiosession"]),
"searx-search": (_get_searx_search, ["searx_host"]),
"wikipedia": (_get_wikipedia, ["top_k_results"]),
"human": (_get_human_tool, ["prompt_func", "input_func"]),
}
def load_tools(
tool_names: List[str],
llm: Optional[BaseLLM] = None,
callback_manager: Optional[BaseCallbackManager] = None,
**kwargs: Any,
) -> List[BaseTool]:
"""Load tools based on their name.
Args:
tool_names: name of tools to load.
llm: Optional language model, may be needed to initialize certain tools.
callback_manager: Optional callback manager. If not provided, default global callback manager will be used.
Returns:
List of tools.
"""
tools = []
for name in tool_names:
if name in _BASE_TOOLS:
tools.append(_BASE_TOOLS[name]())
elif name in _LLM_TOOLS:
if llm is None:
raise ValueError(f"Tool {name} requires an LLM to be provided")
tool = _LLM_TOOLS[name](llm)
if callback_manager is not None:
tool.callback_manager = callback_manager
tools.append(tool)
elif name in _EXTRA_LLM_TOOLS:
if llm is None:
raise ValueError(f"Tool {name} requires an LLM to be provided")
_get_llm_tool_func, extra_keys = _EXTRA_LLM_TOOLS[name]
missing_keys = set(extra_keys).difference(kwargs)
if missing_keys:
raise ValueError(
f"Tool {name} requires some parameters that were not "
f"provided: {missing_keys}"
)
sub_kwargs = {k: kwargs[k] for k in extra_keys}
tool = _get_llm_tool_func(llm=llm, **sub_kwargs)
if callback_manager is not None:
tool.callback_manager = callback_manager
tools.append(tool)
elif name in _EXTRA_OPTIONAL_TOOLS:
_get_tool_func, extra_keys = _EXTRA_OPTIONAL_TOOLS[name]
sub_kwargs = {k: kwargs[k] for k in extra_keys if k in kwargs}
tool = _get_tool_func(**sub_kwargs)
if callback_manager is not None:
tool.callback_manager = callback_manager
tools.append(tool)
else:
raise ValueError(f"Got unknown tool {name}")
return tools
def get_all_tool_names() -> List[str]:
"""Get a list of all possible tool names."""
return (
list(_BASE_TOOLS)
+ list(_EXTRA_OPTIONAL_TOOLS)
+ list(_EXTRA_LLM_TOOLS)
+ list(_LLM_TOOLS)
)
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