I tried running pip install gym==0.21.0
but got the cryptic error:
Collecting gym==0.21.0
Using cached gym-0.21.0.tar.gz (1.5 MB)
Preparing metadata (setup.py) ... error
error: subprocess-exited-with-error
× python setup.py egg_info did not run successfully.
│ exit code: 1
╰─> [1 lines of output]
error in gym setup command: 'extras_require' must be a dictionary whose values are strings or lists of strings containing valid project/version requirement specifiers.
[end of output]
note: This error originates from a subprocess, and is likely not a problem with pip.
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.
What may be causing this error?
Based on the comments in the issue section at https://github.com/openai, these are the changes that need to be made -
pip install setuptools==65.5.0 pip==21 # gym 0.21 installation is broken with more recent versions
pip install wheel==0.38.0
I was facing the same issue and after doing the above, it was resolved.