AttributeError: module 'gym.envs.box2d' has no attribute 'BipedalWalker'

[yanyuegang]

[yanyuegang]

解决方案
pip install box2d-py

[zdx3578]

Box2d
Box2d is a 2D physics engine. You can install it via pip install -e '.[box2d]' and then get started as follows:

import gym
env = gym.make('LunarLander-v2')
env.reset()
env.render()

from https://github.com/openai/gym/blob/master/docs/environments.md