rohitg00/ai-engineering-from-scratch · error · ValueError

tc.mode

Error message

tc.mode

What it means

Error "tc.mode" thrown in rohitg00/ai-engineering-from-scratch.

Source

Thrown at phases/13-tools-and-protocols/02-function-calling-deep-dive/code/main.py:113

            {
                "name": tool.name,
                "description": tool.description,
                "parameters": _gemini_schema(tool.input_schema),
            }
        ]
    }


def tool_choice_openai(tc: ToolChoice) -> Any:
    if tc.mode == "auto":
        return "auto"
    if tc.mode == "none":
        return "none"
    if tc.mode == "required":
        return "required"
    if tc.mode == "force":
        return {"type": "function", "function": {"name": tc.tool_name}}
    raise ValueError(tc.mode)


def tool_choice_anthropic(tc: ToolChoice) -> dict:
    if tc.mode == "auto":
        return {"type": "auto"}
    if tc.mode == "none":
        return {"type": "none"}
    if tc.mode == "required":
        return {"type": "any"}
    if tc.mode == "force":
        return {"type": "tool", "name": tc.tool_name}
    raise ValueError(tc.mode)


def tool_choice_gemini(tc: ToolChoice) -> dict:
    mode_map = {"auto": "AUTO", "none": "NONE", "required": "ANY"}
    if tc.mode in mode_map:
        return {"function_calling_config": {"mode": mode_map[tc.mode]}}

View on GitHub (pinned to 39ea8a1c6d)

When it happens

Trigger: Thrown at phases/13-tools-and-protocols/02-function-calling-deep-dive/code/main.py:113 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of rohitg00/ai-engineering-from-scratch@39ea8a1c6d (2026-08-26). Data as JSON: /api/errors/8d8effe34b9ff2ab. Report an issue: GitHub.