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langchain/langchain/agents/tools.py

33 lines
930 B
Python

"""Interface for tools."""
from typing import Optional
from langchain.callbacks.manager import (
AsyncCallbackManagerForToolRun,
CallbackManagerForToolRun,
)
from langchain.tools.base import BaseTool, Tool, tool
class InvalidTool(BaseTool):
"""Tool that is run when invalid tool name is encountered by agent."""
name = "invalid_tool"
description = "Called when tool name is invalid."
def _run(
self, tool_name: str, run_manager: Optional[CallbackManagerForToolRun] = None
) -> str:
"""Use the tool."""
return f"{tool_name} is not a valid tool, try another one."
async def _arun(
self,
tool_name: str,
run_manager: Optional[AsyncCallbackManagerForToolRun] = None,
) -> str:
"""Use the tool asynchronously."""
return f"{tool_name} is not a valid tool, try another one."
__all__ = ["InvalidTool", "BaseTool", "tool", "Tool"]