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from abc import ABCMeta, abstractmethod
from dataclasses import dataclass, fields, replace
from typing import Any
from anthropic.types.beta import BetaToolUnionParam
class BaseAnthropicTool(metaclass=ABCMeta):
"""Abstract base class for Anthropic-defined tools."""
@abstractmethod
def __call__(self, **kwargs) -> Any:
"""Executes the tool with the given arguments."""
...
@abstractmethod
def to_params(
self,
) -> BetaToolUnionParam:
raise NotImplementedError
@dataclass(kw_only=True, frozen=True)
class ToolResult:
"""Represents the result of a tool execution."""
output: str | None = None
error: str | None = None
base64_image: str | None = None
system: str | None = None
def __bool__(self):
return any(getattr(self, field.name) for field in fields(self))
def __add__(self, other: "ToolResult"):
def combine_fields(
field: str | None, other_field: str | None, concatenate: bool = True
):
if field and other_field:
if concatenate:
return field + other_field
raise ValueError("Cannot combine tool results")
return field or other_field
return ToolResult(
output=combine_fields(self.output, other.output),
error=combine_fields(self.error, other.error),
base64_image=combine_fields(self.base64_image, other.base64_image, False),
system=combine_fields(self.system, other.system),
)
def replace(self, **kwargs):
"""Returns a new ToolResult with the given fields replaced."""
return replace(self, **kwargs)
class CLIResult(ToolResult):
"""A ToolResult that can be rendered as a CLI output."""
class ToolFailure(ToolResult):
"""A ToolResult that represents a failure."""
class ToolError(Exception):
"""Raised when a tool encounters an error."""
def __init__(self, message):
self.message = message
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