reducer

class Reducer(name: str, fn: Callable[[list[T]], R])

Bases: Generic[T, R]

A named reduction policy over a list of values.

name: str

fn: Callable[[list[T]], R]

last_or_none(values: list[T]) → T | None

first_or_none(values: list[T]) → T | None

any_true(values: list[bool]) → bool

all_true(values: list[bool]) → bool

identity(values: list[T]) → list[T]

concat(values: Sequence[Iterable[T]]) → list[T]

unique(values: list[T]) → list[T]

merge_dicts(values: list[dict[str, Any]]) → dict[str, Any]