lenskit.splitting.LastN# class lenskit.splitting.LastN(n, field='timestamp')# Bases: HoldoutMethod Select a fixed number of test rows per user/item, based on ordering by a field. Parameters: n (int) – The number of test items to select. field (str) – The field to order by. __init__(n, field='timestamp')# Parameters: n (int) field (str) Methods __init__(n[, field]) Attributes n field