How do I get resulting weights for concrete user (collab)?

fastai
1

Hi there!

       # user, item, rating
       ratings = [
          [101, 10, 5],
          ...
       ]
    dls = ...
    model = DotProduct(n_users, n_movies, 4)
    learn = flearn.Learner(dls, model, loss_func=flosses.MSELossFlat())
    learn.fit_one_cycle(5, 5e-3, wd=0.1)

    u_weights = learn.model.user_factors

How do I get resulting weights vector for user id=101? All weights in u_weights are indexed starting zero