状況
- Google Colaboratory 上で
!pip install gym==0.21.0を実行したところ、- 2024年2月中旬頃まではエラーなく実行できていた
- 今日(2024/03/20)は、エラーが発生した
前提
- 後続処理で
pybullet_envsを使う - なぜかわからないけど、 gym==0.21.0 じゃないと
import pybullet_envsに失敗する - なので、なんとしても gym==0.21.0 をインストールしたい
エラー発生状況
!pip install gym==0.21.0
# 実行結果
Collecting gym==0.21.0
Downloading gym-0.21.0.tar.gz (1.5 MB)
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 1.5/1.5 MB 7.1 MB/s eta 0:00:00
error: subprocess-exited-with-error
× python setup.py egg_info did not run successfully.
│ exit code: 1
╰─> See above for output.
note: This error originates from a subprocess, and is likely not a problem with pip.
Preparing metadata (setup.py) ... error
error: metadata-generation-failed
× Encountered error while generating package metadata.
╰─> See above for output.
note: This is an issue with the package mentioned above, not pip.
hint: See above for details.
対策
調べていたら、以下のような対策に出くわした。
!pip install setuptools==65.5.0 pip==21 を先に実行しておくといいらしい。
!pip install setuptools==65.5.0 pip==21
!pip install gym==0.21.0
これを実行すると、以下のようになった。
# 実行結果
Collecting setuptools==65.5.0
Downloading setuptools-65.5.0-py3-none-any.whl (1.2 MB)
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 1.2/1.2 MB 8.3 MB/s eta 0:00:00
Collecting pip==21
Downloading pip-21.0-py3-none-any.whl (1.5 MB)
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 1.5/1.5 MB 49.1 MB/s eta 0:00:00
Installing collected packages: setuptools, pip
Attempting uninstall: setuptools
Found existing installation: setuptools 67.7.2
Uninstalling setuptools-67.7.2:
Successfully uninstalled setuptools-67.7.2
Attempting uninstall: pip
Found existing installation: pip 23.1.2
Uninstalling pip-23.1.2:
Successfully uninstalled pip-23.1.2
ERROR: pip's dependency resolver does not currently take into account all the packages that are installed. This behaviour is the source of the following dependency conflicts.
ipython 7.34.0 requires jedi>=0.16, which is not installed.
cvxpy 1.3.3 requires setuptools>65.5.1, but you have setuptools 65.5.0 which is incompatible.
pip-tools 6.13.0 requires pip>=22.2, but you have pip 21.0 which is incompatible.
Successfully installed pip-21.0 setuptools-65.5.0
WARNING: The following packages were previously imported in this runtime:
[_distutils_hack,pkg_resources,setuptools]
You must restart the runtime in order to use newly installed versions.
Collecting gym==0.21.0
Downloading gym-0.21.0.tar.gz (1.5 MB)
|████████████████████████████████| 1.5 MB 2.6 MB/s
Requirement already satisfied: numpy>=1.18.0 in /usr/local/lib/python3.10/dist-packages (from gym==0.21.0) (1.25.2)
Requirement already satisfied: cloudpickle>=1.2.0 in /usr/local/lib/python3.10/dist-packages (from gym==0.21.0) (2.2.1)
Building wheels for collected packages: gym
Building wheel for gym (setup.py) ... error
ERROR: Failed building wheel for gym
Running setup.py clean for gym
Failed to build gym
Installing collected packages: gym
Attempting uninstall: gym
Found existing installation: gym 0.25.2
Uninstalling gym-0.25.2:
Successfully uninstalled gym-0.25.2
Running setup.py install for gym ... done
DEPRECATION: gym was installed using the legacy 'setup.py install' method, because a wheel could not be built for it. A possible replacement is to fix the wheel build issue reported above. You can find discussion regarding this at https://github.com/pypa/pip/issues/8368.
Successfully installed gym-0.21.0
1回目はこうなるので、
その後、以下のような RESTART SESSION ボタンを押して再起動し、
もう一度最初の以下のセルから実行し直すと、
!pip install setuptools==65.5.0 pip==21
!pip install gym==0.21.0
上記セルの実行が成功し、 pybullet_envs も import できるようになった。
!pip install pybullet
import pybullet_envs
import pybullet as p
終わりに
しかし、なぜ成功したのかが全然わからない！！
理由はわからないけど、古い setuptools と pip じゃないと、 gym==0.21.0 の build に失敗するみたい... >_<
なぜか、 setuptools 67.7.2 と pip 23.1.2 から古いバージョンに切り替えると動くもんね。。