Inconsistency of ML-1M statistics in paper and released propcessed dataset

[dekoponTree]

The paper reported that ML-1M dataset have 839 users and 3,256 items.

The statistics is inconsistent with released datasets, which can be reproduced via following scripts

import pandas as pd

train_ = pd.read_pickle('train_ood2.pkl')
valid_ = pd.read_pickle('valid_ood2.pkl')
test_ = pd.read_pickle('test_ood2.pkl')

uids = set(train_.uid.unique()) | set(valid_.uid.unique()) | set(test_.uid.unique())
iids = set(train_.iid.unique()) | set(valid_.iid.unique()) | set(test_.iid.unique())

print(len(uids), len(iids)) # 838, 3255

[zyang1580]

The statistics include one additional padding ID.