HKUDS/nanobot · error · TypeError

{field} must be a string

Error message

{field} must be a string

What it means

Error "{field} must be a string" thrown in HKUDS/nanobot.

Source

Thrown at nanobot/api/server.py:146

    return str(value)


def _as_str(value: object) -> str:
    """Return *value* when it is text, otherwise an empty string."""
    return value if isinstance(value, str) else ""


def _require_json_object(value: object, field: str) -> dict[str, Any]:
    """Validate an object-valued field from an untrusted JSON request."""
    if not isinstance(value, dict):
        raise TypeError(f"{field} must be an object")
    return cast(dict[str, Any], value)


def _require_json_string(value: object, field: str) -> str:
    """Validate a string-valued field from an untrusted JSON request."""
    if not isinstance(value, str):
        raise TypeError(f"{field} must be a string")
    return value


# ---------------------------------------------------------------------------
# SSE helpers
# ---------------------------------------------------------------------------


def _sse_chunk(delta: str, model: str, chunk_id: str, finish_reason: str | None = None) -> bytes:
    """Format a single OpenAI-compatible SSE chunk."""
    payload = {
        "id": chunk_id,
        "object": "chat.completion.chunk",
        "created": int(time.time()),
        "model": model,
        "choices": [
            {
                "index": 0,

View on GitHub (pinned to 42f37dc4c0)

When it happens

Trigger: Thrown at nanobot/api/server.py:146 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of HKUDS/nanobot@42f37dc4c0 (2026-08-26). Data as JSON: /api/errors/e61145216c3ea07d. Report an issue: GitHub.