gym 0.19.0 conflicts with Python 3.10?

[mqchenner]

I'm trying to set up maze planning and can't seem to install gym 0.19.0 with Python 3.10. I've already installed requirements.txt and mujoco210.

Output from pip install -r extra_requirementx.txt:

ERROR: Could not find a version that satisfies the requirement gym==0.19.0 (from versions: 0.0.2, 0.0.3, 0.0.4, 0.0.5, 0.0.6, 0.0.7, 0.1.0, 0.1.1, 0.1.2, 0.1.3, 0.1.4, 0.1.5, 0.1.6, 0.1.7, 0.2.0, 0.2.1, 0.2.2, 0.2.3, 0.2.4, 0.2.5, 0.2.6, 0.2.7, 0.2.8, 0.2.9, 0.2.10, 0.2.11, 0.2.12, 0.3.0, 0.4.0, 0.4.1, 0.4.2, 0.4.3, 0.4.4, 0.4.5, 0.4.6, 0.4.8, 0.4.9, 0.4.10, 0.5.0, 0.5.1, 0.5.2, 0.5.3, 0.5.4, 0.5.5, 0.5.6, 0.5.7, 0.6.0, 0.7.0, 0.7.1, 0.7.2, 0.7.3, 0.7.4, 0.8.0.dev0, 0.8.0, 0.8.1, 0.8.2, 0.9.0, 0.9.1, 0.9.2, 0.9.3, 0.9.4, 0.9.5, 0.9.6, 0.9.7, 0.10.0, 0.10.1, 0.10.2, 0.10.3, 0.10.4, 0.10.5, 0.10.8, 0.10.9, 0.10.11, 0.11.0, 0.12.0, 0.12.1, 0.12.4, 0.12.5, 0.12.6, 0.13.0, 0.13.1, 0.14.0, 0.15.3, 0.15.4, 0.15.6, 0.15.7, 0.16.0, 0.17.0, 0.17.1, 0.17.2, 0.17.3, 0.18.0, 0.18.3, 0.19.0, 0.20.0, 0.21.0, 0.22.0, 0.23.0, 0.23.1, 0.24.0, 0.24.1, 0.25.0, 0.25.1, 0.25.2, 0.26.0, 0.26.1, 0.26.2)
ERROR: No matching distribution found for gym==0.19.0

Output from conda install "gym==0.19.0" -c conda-forge (using mamba):

Channels:

• conda-forge
• defaults
  Platform: linux-64
  Collecting package metadata (repodata.json): done
  Solving environment: failed

LibMambaUnsatisfiableError: Encountered problems while solving:

• package gym-0.19.0-py38he5a9106_0 requires python >=3.8,<3.9.0a0, but none of the providers can be installed

Could not solve for environment specs
The following packages are incompatible
├─ gym ==0.19.0 * is installable with the potential options
│ ├─ gym 0.19.0 would require
│ │ └─ python >=3.6,<3.7.0a0 *, which can be installed;
│ ├─ gym 0.19.0 would require
│ │ └─ python >=3.7,<3.8.0a0 *, which can be installed;
│ ├─ gym 0.19.0 would require
│ │ └─ python >=3.8,<3.9.0a0 *, which can be installed;
│ └─ gym 0.19.0 would require
│ └─ python >=3.9,<3.10.0a0 *, which can be installed;
└─ pin on python =3.10 * is not installable because it requires
└─ python =3.10 *, which conflicts with any installable versions previously reported.

Pins seem to be involved in the conflict. Currently pinned specs:

• python=3.10

Am I missing something? The PyPI page for gym 0.19.0 also doesn't list Python 3.10; seems like 3.10 support was added in gym 0.22.0.

I ended up getting the code to work, but with gym 0.21.0. (conda env yaml here)