Does CollabDataLoaders' Categorify Transform works right? ( in 08_collab.ipynb )

[zhangjiekui]

in 08_collab.ipynb [https://github.com/fastai/fastbook/blob/master/08_collab.ipynb]

dls.classes
outpts:

'user': (#944) ['#na#',1,2,3,4,5,6,7,8,9...], 'title': (#1635) ['#na#',"'Til There Was You (1997)"...]

but actually the dataset has 943 users , 1682 items , what's wrong?

@jph00