Modified from: https://github.com/openai/gym/blob/master/gym/envs/toy_text/taxi.py Uses: https://github.com/openai/gym/blob/master/gym/envs/toy_text/discrete.py
OpenAI's taxi environment was adapted in order to solve the autonomous vehicle in a parking lot problem proposed by Rishal Hurbans in his book Artificial Intelligence Algorithms, 2020, ISBN 9781617296185.