pathwaycom/pathway · error · Exception

unsupported interval type

Error message

unsupported interval type

What it means

Error "unsupported interval type" thrown in pathwaycom/pathway.

Source

Thrown at python/pathway/stdlib/temporal/utils.py:35

    mapping: dict[Any, TimeEventType] = {
        dt.INT: 0,
        dt.FLOAT: 0.0,
        dt.DATE_TIME_NAIVE: pd.Timestamp(year=1973, month=1, day=1, tz=None),
        dt.DATE_TIME_UTC: pd.Timestamp(year=1973, month=1, day=1, tz=tz.UTC),
        # 1973 because it started on Monady and then by default all week-wide windows start on Monday
    }
    return mapping[time_event_type]


def zero_length_interval(interval_type: type[IntervalType]) -> IntervalType:
    if issubclass(interval_type, datetime.timedelta):
        return datetime.timedelta(0)
    elif issubclass(interval_type, int):
        return 0
    elif issubclass(interval_type, float):
        return 0.0
    else:
        raise Exception("unsupported interval type")


def _get_possible_types(type: Any) -> tuple[dt.DType, ...]:
    if type is TimeEventType:
        return (dt.INT, dt.FLOAT, dt.DATE_TIME_NAIVE, dt.DATE_TIME_UTC)
    if type is IntervalType:
        return (dt.INT, dt.FLOAT, dt.DURATION, dt.DURATION)
    raise ValueError("Type has to be either TimeEventType or IntervalType.")


def check_joint_types(parameters: dict[str, tuple[Any, Any]]) -> None:
    """Checks if all parameters have types that allow to execute a function.
    If parameters are {'a': (a, TimeEventType), 'b': (b, IntervalType)} then
    the following pairs of types are allowed for (a, b): (int, int), (float, float),
    (datetime.datetime, datetime.timedelta)
    """

    parameters = {

View on GitHub (pinned to fa2f74a464)

Solutions

1. Use a supported interval type, e.g. pw.temporal.Interval with int or Duration bounds.

Example fix

pw.temporal.Interval(-10, 10)

When it happens

Trigger: Thrown at python/pathway/stdlib/temporal/utils.py:35 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of pathwaycom/pathway@fa2f74a464 (2026-08-15). Data as JSON: /api/errors/e951d825f34ad5dc. Report an issue: GitHub.