How to access user/item features in sequential model?

[Li-Muyang]

Hi all, I'm trying to access the class of items in ml-100k dataset, however it strikes me that for 2 items belong to a same class (for instance item 32 and item 48 are both Documentary), they have different class tokens ([7,6,0,0,0,0] and [4,3,7,0,0,0]). Shouldn't two items from same class share same class token? Or did I miscomprehend some where.

[Ethan-TZ]

@Li-Muyang Hello, thanks for your attention to RecBole!
In this case, you may use external_id to retrieve items.In RecBole, we will remap the item_id,and use the internal_id to index the items
.You can refer to issue979 for the concepts of external_id and internal_id.In particular, you can get the information of these two items through the following code:

# you can use dataset.token2id to transfer external user token to internal user id
    iid_series = dataset.token2id(dataset.iid_field, ['32', '48'])
    info = dataset.item_feat[iid_series]

Their class tokens are [14,0,0,0,0,0].

[Li-Muyang]

Thanks, that's very helpful!