Can't get mujoco example working on colab

[asmith26]

Hi there,

I've been trying to this mujoco example working on Google Colab, but unfortunately I seem to get the following error:

You appear to be missing MuJoCo.  We expected to find the file here: /root/.mujoco/mujoco210

This package only provides python bindings, the library must be installed separately.

Please follow the instructions on the README to install MuJoCo

    https://github.com/openai/mujoco-py#install-mujoco

Which can be downloaded from the website

    https://www.roboti.us/index.html

---------------------------------------------------------------------------

AttributeError                            Traceback (most recent call last)

[/usr/local/lib/python3.10/dist-packages/ding/envs/env_manager/base_env_manager.py](https://localhost:8080/#) in __init__(self, env_fn, cfg)
    110         try:
--> 111             self._observation_space = self._env_ref.observation_space
    112             self._action_space = self._env_ref.action_space

16 frames

AttributeError: 'MujocoEnvLZ' object has no attribute '_observation_space'


During handling of the above exception, another exception occurred:

Exception                                 Traceback (most recent call last)

[/usr/local/lib/python3.10/dist-packages/mujoco_py/utils.py](https://localhost:8080/#) in discover_mujoco()
     76         message = MISSING_MUJOCO_MESSAGE.format(mujoco_path)
     77         print(message, file=sys.stderr)
---> 78         raise Exception(message)
     79 
     80     return mujoco_path

Exception: 
You appear to be missing MuJoCo.  We expected to find the file here: /root/.mujoco/mujoco210

This package only provides python bindings, the library must be installed separately.

Please follow the instructions on the README to install MuJoCo

    https://github.com/openai/mujoco-py#install-mujoco

Which can be downloaded from the website

    https://www.roboti.us/index.html

I think mujoco-py (which I believe is deprecated) is being installed as a result of gym - just wondering if it makes sense to move to https://github.com/Farama-Foundation/Gymnasium?

Many thanks for any help (sorry if I've mistaken the cause of the error), and many many thanks for an amazing lib! :)

[puyuan1996]

Hello,

Thank you for your inquiry and interest in our work.

Your error seems to stem from an incorrect installation of MuJoCo. We have previously conducted our tests using the mujoco_py package. We are providing below a sequence of installation steps for the Linux operating system. We wish to inform you that we plan to transition our dependency from mujoco_py to the most recent version of mujoco in our forthcoming updates.

Here are the steps to install the current version:

1. Download and Install MuJoCo210

   Begin by downloading MuJoCo210 and relocating it to the ~/.mujoco directory:

   mkdir ~/.mujoco
   cd ~/.mujoco
   
   wget https://mujoco.org/download/mujoco210-linux-x86_64.tar.gz
   tar -zxvf mujoco210-linux-x86_64.tar.gz 

2. Install mujoco_py

   Proceed to install the mujoco_py Python package using pip:

   pip install mujoco_py==2.1.2.14

3. Set Environment Variables

   It is critical to ensure that environment variables such as the following are set correctly:

   export LD_LIBRARY_PATH=${HOME}/opt/anaconda3/include/python3.8/:${LD_LIBRARY_PATH}
   export LD_LIBRARY_PATH=${HOME}/.mujoco/mujoco210:${LD_LIBRARY_PATH}
   export LD_LIBRARY_PATH=${LD_LIBRARY_PATH}:/usr/local/lib
   export MUJOCO_PY_MUJOCO_PATH=${HOME}/.mujoco/mujoco210

4. Test Your Installation

   You can verify the correct installation of mujoco_py by running:

   python
   import mujoco_py

We appreciate your patience and understanding as we work on updating our dependencies.

Best Regards.

[asmith26]

Thanks very much for your information and help. I came across openai/mujoco-py#640 (comment) that helped to install mujoco_py on colab.