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82 lines
2.8 KiB
Python
82 lines
2.8 KiB
Python
"""Interface for tools."""
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import asyncio
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from dataclasses import dataclass
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from inspect import signature
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from typing import Any, Awaitable, Callable, Optional, Union
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@dataclass
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class Tool:
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"""Interface for tools."""
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name: str
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func: Callable[[str], str]
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description: Optional[str] = None
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return_direct: bool = False
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# If the tool has a coroutine, then we can use this to run it asynchronously
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coroutine: Optional[Callable[[str], Awaitable[str]]] = None
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def __call__(self, *args: Any, **kwargs: Any) -> str:
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"""Make tools callable by piping through to `func`."""
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if asyncio.iscoroutinefunction(self.func):
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raise TypeError("Coroutine cannot be called directly")
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return self.func(*args, **kwargs)
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def tool(
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*args: Union[str, Callable], return_direct: bool = False
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) -> Union[Callable, Tool]:
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"""Make tools out of functions, can be used with or without arguments.
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Requires:
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- Function must be of type (str) -> str
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- Function must have a docstring
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Examples:
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.. code-block:: python
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@tool
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def search_api(query: str) -> str:
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# Searches the API for the query.
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return
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@tool("search", return_direct=True)
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def search_api(query: str) -> str:
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# Searches the API for the query.
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return
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"""
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def _make_with_name(tool_name: str) -> Callable:
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def _make_tool(func: Callable[[str], str]) -> Tool:
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assert func.__doc__, "Function must have a docstring"
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# Description example:
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# search_api(query: str) - Searches the API for the query.
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description = f"{tool_name}{signature(func)} - {func.__doc__.strip()}"
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tool = Tool(
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name=tool_name,
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func=func,
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description=description,
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return_direct=return_direct,
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)
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return tool
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return _make_tool
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if len(args) == 1 and isinstance(args[0], str):
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# if the argument is a string, then we use the string as the tool name
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# Example usage: @tool("search", return_direct=True)
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return _make_with_name(args[0])
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elif len(args) == 1 and callable(args[0]):
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# if the argument is a function, then we use the function name as the tool name
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# Example usage: @tool
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return _make_with_name(args[0].__name__)(args[0])
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elif len(args) == 0:
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# if there are no arguments, then we use the function name as the tool name
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# Example usage: @tool(return_direct=True)
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def _partial(func: Callable[[str], str]) -> Tool:
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return _make_with_name(func.__name__)(func)
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return _partial
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else:
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raise ValueError("Too many arguments for tool decorator")
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