pola-rs/polars · error · TypeError

Unexpected UnaryOp: {a}

Error message

Unexpected UnaryOp: {a}

What it means

Error "Unexpected UnaryOp: {a}" thrown in pola-rs/polars.

Source

Thrown at py-polars/src/polars/io/iceberg/_utils.py:195

@_convert_predicate.register(Constant)
def _(a: Constant) -> Any:
    return a.value


@_convert_predicate.register(Name)
def _(a: Name) -> Any:
    return a.id


@_convert_predicate.register(UnaryOp)
def _(a: UnaryOp) -> Any:
    if isinstance(a.op, Invert):
        operand = _ensure_boolean_expression(_convert_predicate(a.operand))
        return pyiceberg.expressions.Not(operand)
    else:
        msg = f"Unexpected UnaryOp: {a}"
        raise TypeError(msg)


@_convert_predicate.register(Call)
def _(a: Call) -> Any:
    args = [_convert_predicate(arg) for arg in a.args]
    f = _convert_predicate(a.func)
    if f == "field":
        return args
    elif f == "scalar":
        return args[0]
    elif f in _temporal_conversions:
        # convert from polars-native i64 to ISO8601 string
        return _temporal_conversions[f](*args).isoformat()
    else:
        ref = _convert_predicate(a.func.value)[0]  # type: ignore[attr-defined]
        if f == "isin":
            return pyiceberg.expressions.In(ref, args[0])  # type: ignore[misc, call-arg]
        elif f == "is_null":

View on GitHub (pinned to df599052da)

When it happens

Trigger: Thrown at py-polars/src/polars/io/iceberg/_utils.py:195 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of pola-rs/polars@df599052da (2026-08-16). Data as JSON: /api/errors/dff199bca543e490. Report an issue: GitHub.