recpack.preprocessing.filters.NMostRecent

class recpack.preprocessing.filters.NMostRecent(N: int, item_ix: str, timestamp_ix: str)

Select only events on the N most recently visited items.

If there is a tie, the first occuring item in the DataFrame is retained.

Parameters

N (int) – Number of items to retain.
item_ix (str) – Name of the column in which item identifiers are listed.
timestamp_ix (str, optional) – Name of the column in which timestamps are listed, defaults to None

Methods

`apply`(df)	Apply Filter to the DataFrame passed.
`apply_all`(*dfs)	Apply the filter to a list of pandas DataFrames.

apply(df)

Apply Filter to the DataFrame passed.

apply_all(*dfs: pandas.core.frame.DataFrame) → List[pandas.core.frame.DataFrame]

Apply the filter to a list of pandas DataFrames.

The filter is applied independently to each of the DataFrames.