Simplify misc

[dangotbanned]

Some odds and ends that aren't in a category (yet?)

PRs

• chore: Simplify to_py_scalar #2503
• fix: Include all backends in get_native_namespace #2608
• chore: Simplify is_ordered_categorical #2618
• refactor: Simplify Implementation.to_native_namespace #2620
• refactor: Simplify combine_metadata #2836
• refactor: Simplify calculate_timestamp_datetime and calculate_timestamp_date #2838
• refactor: Reduce returns in Namespace.from_native_object #2914

Tracking

• API: io functions for v2 #2116

Complex warnings

Best to leave this until all the from_native methods are ready

narwhals/narwhals/translate.py

Line 363 in 018d923

def _from_native_impl( # noqa: C901, PLR0911, PLR0912, PLR0915

Completed

narwhals/narwhals/translate.py

Line 776 in 018d923

def to_py_scalar(scalar_like: Any) -> Any: # noqa: C901, PLR0911, PLR0912

narwhals/narwhals/translate.py

Lines 634 to 636 in 018d923

	def _get_native_namespace_single_obj( # noqa: PLR0911
	obj: DataFrame[Any] | LazyFrame[Any] | Series[Any] | IntoFrame | IntoSeries,
	) -> Any:

narwhals/narwhals/utils.py

Line 1148 in 018d923

def is_ordered_categorical(series: Series[Any]) -> bool: # noqa: PLR0911

narwhals/narwhals/utils.py

Line 345 in 018d923

def to_native_namespace(self) -> ModuleType: # noqa: C901, PLR0911

narwhals/narwhals/_expression_parsing.py

Line 363 in 018d923

def combine_metadata( # noqa: C901, PLR0912, PLR0915

narwhals/narwhals/_pandas_like/utils.py

Lines 599 to 601 in 018d923

	def calculate_timestamp_datetime( # noqa: C901, PLR0912
	s: pd.Series[int], original_time_unit: str, time_unit: str
	) -> pd.Series[int]:

narwhals/narwhals/_namespace.py

Lines 289 to 292 in 018d923

	@classmethod
	def from_native_object( # noqa: PLR0911
	cls: type[Namespace[Any]], native: NativeAny, /
	) -> Namespace[Any]:

[dangotbanned]

@FBruzzesi for the _namespace.py one I have an API change idea, but haven't got around to typing it up.

Let me know if you start on it and I'll pull my act together 😂

[FBruzzesi]

Hey @dangotbanned - no I didn't take a look at it yet, so feel free to go ahead with your idea :)