NOTE: Please see @franroldans comment below for a much cleaner solution using free-mujoco-py! [Orig] MuJoCo 2.1 working in Google Colab for OpenAI gym. Just add this as a code block near the top of your notebook to get MuJoCo setup.

google-colab-mujoco-py-setup.py

#Include this at the top of your colab code
import os
if not os.path.exists('.mujoco_setup_complete'):
  # Get the prereqs
  !apt-get -qq update
  !apt-get -qq install -y libosmesa6-dev libgl1-mesa-glx libglfw3 libgl1-mesa-dev libglew-dev patchelf
  # Get Mujoco
  !mkdir ~/.mujoco
  !wget -q https://mujoco.org/download/mujoco210-linux-x86_64.tar.gz -O mujoco.tar.gz
  !tar -zxf mujoco.tar.gz -C "$HOME/.mujoco"
  !rm mujoco.tar.gz
  # Add it to the actively loaded path and the bashrc path (these only do so much)
  !echo 'export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:$HOME/.mujoco/mujoco210/bin' >> ~/.bashrc 
  !echo 'export LD_PRELOAD=$LD_PRELOAD:/usr/lib/x86_64-linux-gnu/libGLEW.so' >> ~/.bashrc 
  # THE ANNOYING ONE, FORCE IT INTO LDCONFIG SO WE ACTUALLY GET ACCESS TO IT THIS SESSION
  !echo "/root/.mujoco/mujoco210/bin" > /etc/ld.so.conf.d/mujoco_ld_lib_path.conf
  !ldconfig
  # Install Mujoco-py
  !pip3 install -U 'mujoco-py<2.2,>=2.1'
  # run once
  !touch .mujoco_setup_complete

try:
  if _mujoco_run_once:
    pass
except NameError:
  _mujoco_run_once = False
if not _mujoco_run_once:
  # Add it to the actively loaded path and the bashrc path (these only do so much)
  try:
    os.environ['LD_LIBRARY_PATH']=os.environ['LD_LIBRARY_PATH'] + ':/root/.mujoco/mujoco210/bin'
  except KeyError:
    os.environ['LD_LIBRARY_PATH']='/root/.mujoco/mujoco210/bin'
  try:
    os.environ['LD_PRELOAD']=os.environ['LD_PRELOAD'] + ':/usr/lib/x86_64-linux-gnu/libGLEW.so'
  except KeyError:
    os.environ['LD_PRELOAD']='/usr/lib/x86_64-linux-gnu/libGLEW.so'
  # presetup so we don't see output on first env initialization
  import mujoco_py
  _mujoco_run_once = True

Do you know why I am having this error?

Missing path to your environment variable.
Current values LD_LIBRARY_PATH=/usr/local/nvidia/lib:/usr/local/nvidia/lib64:/root/.mujoco/mujoco210/bin
Please add following line to .bashrc:
export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/lib/nvidia

I solved that by replacing this cell with the following:

!apt-get install -y \
   libgl1-mesa-dev \
   libgl1-mesa-glx \
   libglew-dev \
   libosmesa6-dev \
   software-properties-common

!apt-get install -y patchelf 

!pip install free-mujoco-py

Thank you, I really appreciate your help

@Dania0322 Yeah, there's probably a mistake I have in there with the messy way I tried to fill in some of the environment variables. I needed this for a project, so there's a bit of garbage in this gist that I don't exactly like. If ever needed, I may come back later to improve this, but at the moment, what @franroldans shared is a much cleaner solution since free-mujoco-py exists. I've noted this in the description too now.

Thanks @franroldans!

after installing this free version when I am making env=gym.make('Humanoid-v2') and when i write env.render()
I am getting error
GLFW error (code %d): %s 65544 b'X11: The DISPLAY environment variable is missing'
GLFW error (code %d): %s 65544 b'X11: The DISPLAY environment variable is missing'

---

GlfwError Traceback (most recent call last)

in ()
----> 1 env.render()

4 frames

/usr/local/lib/python3.7/dist-packages/mujoco_py/mjviewer.py in init(self, sim)
26
27 def init(self, sim):
---> 28 super().init(sim)
29
30 self._gui_lock = Lock()

mjrendercontext.pyx in mujoco_py.cymj.MjRenderContextWindow.init()

mjrendercontext.pyx in mujoco_py.cymj.MjRenderContext.init()

mjrendercontext.pyx in mujoco_py.cymj.MjRenderContext._setup_opengl_context()

opengl_context.pyx in mujoco_py.cymj.GlfwContext.init()

opengl_context.pyx in mujoco_py.cymj.GlfwContext._init_glfw()

GlfwError: Failed to initialize GLFW
Kindly tell me why i am unable to view