[Question] Install Gymnasium with `mujoco-py` on M1 about gymnasium

[Kallinteris-Andreas]

@hg6185 pip uninstall mujoco-py and MuJoCo environments v4 and v5 should work

[pseudo-rnd-thoughts]

I have an old intel MacBook so I can't test for M1
Personally, I don't think we should remove mujoco py from all

[Kallinteris-Andreas]

Just install the components you want pip install gymnasium[box2d, mujoco, other]

I can not really help with installing mujoco-py in ARM MACs, all I can suggest

1. try using the X86 version
2. use gcc9 as suggested,

[hg6185]

Thank you for your answer.

Unfortunately is gcc9 not longer available due to upstream incompatibilities. Which is why I mapped the gcc-9 commands to GCC. However this did not lead to to success. Maybe someone else will encounter the same issue and is more advanced in this compiler stuff :D

[pseudo-rnd-thoughts]

The issue is related to mujoco-py (the v2 and v3 mujoco environments) so I would try gymnasium[mujoco] which only supports v4 and soon v5 environments

Let us know if this works so we can close the issue

[Kallinteris-Andreas]

@pseudo-rnd-thoughts I Believe you have an Apple laptop Have you gotten MuJoCo-py Pi to work in your computer?

Should we remove MuJoCo from pip install gymnasium[all], It seems to cause issues to users who do not intend to use old versions of MuJoCo environments?

[hg6185]

Unfortunately, I doesn't – Maybe something else is wrong set-up in my computer. Mujoco with it's python binding works like a charm.
Today, I tried it again in a new env, but I still ran into the following problems. If I create the installation at .mujoco/mucoco210, I still get the gcc error.

[pseudo-rnd-thoughts]

@hg6185 Can you confirm is the issue only for pip install gymnasium[mujoco] or pip install gymnasium[mujoco-py]?
If it is for mujoco-py, are you certain that you need the v2 or v3 environments?

[hg6185]

No, I cannot confirm this. The issue occurs also in v4 envs. For instance, If I run

import gymnasium as gym
gym.make("Pusher-v4") 

I get the following error:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/Users/henrikg/miniconda3/lib/python3.10/site-packages/gymnasium/envs/registration.py", line 756, in make
    env_creator = load_env_creator(env_spec.entry_point)
  File "/Users/henrikg/miniconda3/lib/python3.10/site-packages/gymnasium/envs/registration.py", line 545, in load_env_creator
    mod = importlib.import_module(mod_name)
  File "/Users/henrikg/miniconda3/lib/python3.10/importlib/__init__.py", line 126, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 1050, in _gcd_import
  File "<frozen importlib._bootstrap>", line 1027, in _find_and_load
  File "<frozen importlib._bootstrap>", line 992, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 241, in _call_with_frames_removed
  File "<frozen importlib._bootstrap>", line 1050, in _gcd_import
  File "<frozen importlib._bootstrap>", line 1027, in _find_and_load
  File "<frozen importlib._bootstrap>", line 1006, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 688, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 883, in exec_module
  File "<frozen importlib._bootstrap>", line 241, in _call_with_frames_removed
  File "/Users/henrikg/miniconda3/lib/python3.10/site-packages/gymnasium/envs/mujoco/__init__.py", line 1, in <module>
    from gymnasium.envs.mujoco.mujoco_env import MujocoEnv, MuJocoPyEnv  # isort:skip
  File "/Users/henrikg/miniconda3/lib/python3.10/site-packages/gymnasium/envs/mujoco/mujoco_env.py", line 13, in <module>
    import mujoco_py
  File "/Users/henrikg/miniconda3/lib/python3.10/site-packages/mujoco_py/__init__.py", line 2, in <module>
    from mujoco_py.builder import cymj, ignore_mujoco_warnings, functions, MujocoException
  File "/Users/henrikg/miniconda3/lib/python3.10/site-packages/mujoco_py/builder.py", line 504, in <module>
    cymj = load_cython_ext(mujoco_path)
  File "/Users/henrikg/miniconda3/lib/python3.10/site-packages/mujoco_py/builder.py", line 110, in load_cython_ext
    cext_so_path = builder.build()
  File "/Users/henrikg/miniconda3/lib/python3.10/site-packages/mujoco_py/builder.py", line 226, in build
    built_so_file_path = self._build_impl()
  File "/Users/henrikg/miniconda3/lib/python3.10/site-packages/mujoco_py/builder.py", line 333, in _build_impl
    raise RuntimeError(
RuntimeError: Could not find supported GCC executable.

HINT: On OS X, install GCC 9.x with `brew install gcc@9`. or `port install gcc9`.

The issue is related to the script that searches for the cpp compiler. However, whatever I do with the path variables, the GCC is not accepted by the mujoco simulator in .mujoco/mujoco210. Is it not possible to change this? Normal mujoco and dm_control works with my setup?

[hg6185]

YESSSS!!!! It workssss thank you so much!

(I also downgraded to mujoco==2.3.0)
Thank you so much!