ray.data.grouped_data.GroupedData

class ray.data.grouped_data.GroupedData(dataset: Dataset, key: str | List[str])

Represents a grouped dataset created by calling Dataset.groupby().

The actual groupby is deferred until an aggregation is applied.

Methods

__init__	Construct a dataset grouped by key (internal API).
aggregate	Implements an accumulator-based aggregation.
count	Compute count aggregation.
map_groups	Apply the given function to each group of records of this dataset.
max	Compute grouped max aggregation.
mean	Compute grouped mean aggregation.
min	Compute grouped min aggregation.
std	Compute grouped standard deviation aggregation.
sum	Compute grouped sum aggregation.