lenskit.data.MutableItemListCollection

class lenskit.data.MutableItemListCollection(key, *, index=True)

Bases: ItemListCollector, ItemListCollection[K], Generic[K]

Intersection type of ItemListCollection and ItemListCollector.

__init__(*args, **kwargs)

Methods

__init__(*args, **kwargs)
add(list, *fields, **kwfields)	Add a single item list to this list.
add_from(other, **fields)	Add all collection from another collection to this collection.
empty(key, *[, index])	Create a new empty, mutable item list collection.
from_df(df, key, *others)	Create an item list collection from a data frame.
from_dict(data[, key])	Create an item list collection from a dictionary.
items()	Iterate over item lists and keys.
keys()	Iterate over keys.
lists()	Iterate over item lists without keys.
load_parquet(path[, key, layout])	Load this item list from a Parquet file.
lookup(*args, **kwargs)	Look up a list by key.
lookup_projected(key)	Look up an item list using a projected key.
record_batches([batch_size, columns])	Get the item list collection as Arrow record batches (in native layout).
save_parquet(path, *[, layout, batch_size, ...])	Save this item list collection to a Parquet file.
to_arrow(*[, batch_size])	Convert this item list collection to an Arrow table.
to_df()	Convert this item list collection to a data frame.

Attributes

key_fields	The names of the key fields.
key_type	The type of collection keys.
list_schema	Get the schema for the lists in this ILC.