Feature Engineering

To add multiple transformations to the observations of your environment, follow the following steps:

1. Subclass hearts_gym.envs.ObsTransform.

2. Implement a transform method with the same signature as given by the superclass.

3. Add the newly implemented class to the list of transformations obs_transforms in configuration.py, for example like this:

   # Note that we are adding instances of the class.
   obs_transforms: List[ObsTransform] = [
       MyObsTransform(),
   ]
   

4. Adjust the first definition of the obs_space variable in the HeartsEnv.__init__ method according to the observation space you receive after running through all transformations. Look through the gym.spaces module for help with this step.

The transformations in obs_transforms will be applied in order of appearing in the list.