Some examples don't work

[qo4on]

I'm a new to DeepTables. How can I fix them?
automl:

      9 best_trial = hdt.get_best_trial()
---> 10 print(f'best reward:{best_trial.reward}')

AttributeError: 'NoneType' object has no attribute 'reward'

batch_trainer and batch_trainer-cv:

----> 2 from deeptables.utils import consts, dt_logging, batch_trainer

/usr/local/lib/python3.7/dist-packages/deeptables/utils/dart_early_stopping.py
----> 5 from lightgbm.compat import range_
ImportError: cannot import name 'range_' from 'lightgbm.compat' (/usr/local/lib/python3.7/dist-packages/lightgbm/compat.py)

dt_cross_validation:

roc_auc_score(y_train, oof_proba)
ValueError: bad input shape (627, 2)

[lixfz]

@qo4on

1. To run automl example, update the lastest notebook code from the master branch pls.
2. To run batch_trainer-cv example, downgrade lightgbm to 3.1.1 pls. We'll remove the dependency in future.