How to install and run gym box2d environment in google colab? - python-3.x

Question

I have followed this method to run a box2d enviroment without rendering it in google colab,
!apt-get install python-box2d
!pip install box2d-py
!pip install gym[Box_2D]
import gym
env = gym.make("BipedalWalker-v2")
but its showing this
Reading package lists... Done
Building dependency tree
Reading state information... Done
python-box2d is already the newest version (2.3.2~dfsg-2).
0 upgraded, 0 newly installed, 0 to remove and 28 not upgraded.
Requirement already satisfied: box2d-py in /usr/local/lib/python3.6/dist-packages (2.3.8)
Requirement already satisfied: gym[Box_2D] in /usr/local/lib/python3.6/dist-packages (0.15.3)
WARNING: gym 0.15.3 does not provide the extra 'box_2d'
Requirement already satisfied: six in /usr/local/lib/python3.6/dist-packages (from gym[Box_2D]) (1.12.0)
Requirement already satisfied: pyglet<=1.3.2,>=1.2.0 in /usr/local/lib/python3.6/dist-packages (from gym[Box_2D]) (1.3.2)
Requirement already satisfied: numpy>=1.10.4 in /usr/local/lib/python3.6/dist-packages (from gym[Box_2D]) (1.17.3)
Requirement already satisfied: scipy in /usr/local/lib/python3.6/dist-packages (from gym[Box_2D]) (1.3.1)
Requirement already satisfied: cloudpickle~=1.2.0 in /usr/local/lib/python3.6/dist-packages (from gym[Box_2D]) (1.2.2)
Requirement already satisfied: future in /usr/local/lib/python3.6/dist-packages (from pyglet<=1.3.2,>=1.2.0->gym[Box_2D]) (0.16.0)
---------------------------------------------------------------------------
AttributeError Traceback (most recent call last)
<ipython-input-10-62ca95674145> in <module>()
3 get_ipython().system('pip install gym[Box_2D]')
4 import gym
----> 5 env = gym.make("BipedalWalker-v2")
3 frames
/usr/local/lib/python3.6/dist-packages/gym/envs/registration.py in load(name)
16 mod_name, attr_name = name.split(":")
17 mod = importlib.import_module(mod_name)
---> 18 fn = getattr(mod, attr_name)
19 return fn
20
AttributeError: module 'gym.envs.box2d' has no attribute 'BipedalWalker'
I also tried to install this box2d from pip pip install Box2D but its not installing in colab. How do we install and run a box2d gym enviroment in google colag?

Answer 1

I was able to get it working with !pip3 install box2d-py==2.3.8.

Answer 2

Please create a new Colab notebook, Click on File -> New notebook. On a new (fresh) Colab execute these:
!pip3 install box2d-py
!pip3 install gym[Box_2D]
import gym
env = gym.make("BipedalWalker-v3")
The gym is installed by default in the new notebook however you have to install the box2d-py and gym[Box_2D]. Please close the current notebook if you have encountered the error. Simply use a new notebook (VERY IMPORTANT) and go on with above procedure of pip install. It will work!