OpenAI Gym Environments for Donkey Car

Donkey Car OpenAI Gym

• Free software: MIT license
• Documentation: https://gym-donkeycar.readthedocs.io/en/latest/

Installation

• Install with pip

pip install gym-donkeycar

• Download simulator binaries: https://github.com/tawnkramer/gym-donkeycar/releases

Example Usage

A short and compact introduction for people who know gym environments, but want to understand this one. Simple example code:

import os
import gym
import gym_donkeycar
import numpy as np

#%% SET UP ENVIRONMENT
exe_path = f"{PATH_TO_APP}/donkey_sim.app/Contents/MacOS/donkey_sim"
port = 9091

env = gym.make("donkey-warehouse-v0", exe_path=exe_path, port=port)

#%% PLAY
obv = env.reset()
for t in range(100):
    action = np.array([0.0,0.5]) # drive straight with small speed
# execute the action
obv, reward, done, info = env.step(action)

• see more examples: https://github.com/tawnkramer/gym-donkeycar/tree/master/examples

Action space

A permissable action is a numpy array of length two with first steering and throttle, respectively. E.g. np.array([0,1]) goes straight at full speed, np.array([-5,1]) turns left etc.

Action Space: Box(2,)

Action names: ['steer', 'throttle']

What you receive back on step

• obv: The image that the donkey is seeing (np.array shape (120,160,3))
• reward: a reward that combines game over, how far from center and speed (max=1, min approx -2)
• done: Boolean. Game over if cte > max_cte or hit != "none"
• info contains: - cte: Cross track error (how far from center line) - positions: x,y,z - speed: positive forward, negative backward - hit: 'none' if all is good.

example info:

{'pos': (51.49209, 0.7399381, 117.3004),
 'cte': -5.865292,
 'speed': 9.319956,
 'hit': 'none'}

Environments

• "donkey-warehouse-v0"
• "donkey-generated-roads-v0"
• "donkey-avc-sparkfun-v0"
• "donkey-generated-track-v0"
• "donkey-mountain-track-v0"

Credits

Original Source Code

Tawn Kramer - https://github.com/tawnkramer/gym-donkeycar

Roma Sokolkov - https://github.com/r7vme/gym-donkeycar cloned with permission from https://github.com/tawnkramer/sdsandbox

Release Engineer

This package was created with Cookiecutter and the audreyr/cookiecutter-pypackage project template.