If you’re trying to create a custom Gym/Gymnasium reinforcement learning environment, you’ll need to understand the Gymnasium.Spaces.Box (formerly OpenAI's gym.spaces.Box) type. The Box is used to bound the action space and observation space. It allows you to retrieve random samples from those spaces. This video explains and demos how to create boxes of different sizes/shapes, lower (low) and upper (high) boundaries, and as int/float data types.