In the `setPosition` [function](https://github.com/mpatacchiola/dissecting-reinforcement-learning/blob/c25b3a4708db0567e0ecbeab48ba0aac6d5395cd/src/4/gridworld.py#L98) function at [line 102](https://github.com/mpatacchiola/dissecting-reinforcement-learning/blob/c25b3a4708db0567e0ecbeab48ba0aac6d5395cd/src/4/gridworld.py#L102) there are two undefined variables (`tot_row` and `tot_col`).
