How to use the implicit._als.calculate_loss function in implicit

def inner(iteration, elapsed):
            loss = calculate_loss(plays, model.item_factors, model.user_factors, 0)
            print("model %s iteration %i loss %.5f" % (name, iteration, loss))
            output[name].append(loss)
        return inner

                         lambda _, X, Y: output['cg%i' % steps].append(calculate_loss(plays, X, Y,
                                                                                      0)),
                         iterations=25)

                     lambda _, X, Y: output['cholesky'].append(calculate_loss(plays, X, Y,
                                                                              0)),
                     iterations=25)