from gym.envs.registration import register

register(
    id='CustomEnv-v0',
    # id by which to refer to the new environment;
    # the string is passed as an argument to gym.make() to create a copy of the environment
    entry_point='gym_custom.envs:CustomEnv',
    # points to the class that inherits from gym.Env and defines the four basic functions,
    # i.e. reset, step, render, close

)