pola-rs/polars · error · TypeError

invalid input for shape: {shape!r}

Error message

invalid input for shape: {shape!r}

What it means

Error "invalid input for shape: {shape!r}" thrown in pola-rs/polars.

Source

Thrown at py-polars/src/polars/datatypes/classes.py:1250

        inner_parsed = polars.datatypes.parse_into_dtype(inner)
        inner_shape = inner_parsed.shape if isinstance(inner_parsed, Array) else ()

        if isinstance(shape, int):
            self.inner = inner_parsed
            self.size = shape
            self.shape = (shape,) + inner_shape

        elif isinstance(shape, tuple) and isinstance(shape[0], int):  # type: ignore[redundant-expr]
            if len(shape) > 1:
                inner_parsed = Array(inner_parsed, shape[1:])

            self.inner = inner_parsed
            self.size = shape[0]
            self.shape = shape + inner_shape

        else:
            msg = f"invalid input for shape: {shape!r}"
            raise TypeError(msg)

    def __eq__(self, other: PolarsDataType) -> bool:  # type: ignore[override]
        # This equality check allows comparison of type classes and type instances.
        # If a parent type is not specific about its inner type, we infer it as equal:
        # > array[i64] == array[i64] -> True
        # > array[i64] == array[f32] -> False
        # > array[i64] == array      -> True

        # allow comparing object instances to class
        if type(other) is DataTypeClass and issubclass(other, Array):
            return True
        elif isinstance(other, Array):
            if self.shape != other.shape:
                return False
            else:
                return self.inner == other.inner
        else:
            return False

View on GitHub (pinned to df599052da)

When it happens

Trigger: Thrown at py-polars/src/polars/datatypes/classes.py:1250 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/fe70fc2282eaa6b1. Report an issue: GitHub.