[Bug Report] Missing requirement

[deep-sci]

Describe the bug

Hi,

I recently tried using Gymnasium and run the example:

import gymnasium as gym
env = gym.make("LunarLander-v3", render_mode="human")
observation, info = env.reset(seed=42)
for _ in range(1000):
   action = env.action_space.sample()  # this is where you would insert your policy
   observation, reward, terminated, truncated, info = env.step(action)

   if terminated or truncated:
      observation, info = env.reset()

env.close()

However, I faced error:

Traceback (most recent call last):
  File "/Users/raila/Desktop/code/Gymnasium/gymnasium/envs/box2d/bipedal_walker.py", line 15, in <module>
    import Box2D
ModuleNotFoundError: No module named 'Box2D'

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/Users/raila/Desktop/code/Gymnasium/example.py", line 2, in <module>
    env = gym.make("LunarLander-v3", render_mode="human")
  File "/Users/raila/Desktop/code/Gymnasium/gymnasium/envs/registration.py", line 702, in make
    env_creator = load_env_creator(env_spec.entry_point)
  File "/Users/raila/Desktop/code/Gymnasium/gymnasium/envs/registration.py", line 549, in load_env_creator
    mod = importlib.import_module(mod_name)
  File "/opt/miniconda3/envs/gymnasium-py10/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/raila/Desktop/code/Gymnasium/gymnasium/envs/box2d/__init__.py", line 1, in <module>
    from gymnasium.envs.box2d.bipedal_walker import BipedalWalker, BipedalWalkerHardcore
  File "/Users/raila/Desktop/code/Gymnasium/gymnasium/envs/box2d/bipedal_walker.py", line 25, in <module>
    raise DependencyNotInstalled(
gymnasium.error.DependencyNotInstalled: Box2D is not installed, you can install it by run `pip install swig` followed by `pip install "gymnasium[box2d]"`

I was able to resolve it by

• pip install swig
• pip install "gymnasium[box2d]"

Is it possible to add these additional packages to the requirements.txt?

Code example

No response

System info

'1.0.0a2'

Additional context

No response

Checklist

• [X] I have checked that there is no similar issue in the repo

[deep-sci]

Sorry it was available on installing gymnasium[all].