When I installed python 3.11 and then installed PyQt, the installation always failed, and the error was as follows:

   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.

I translated it with Google:

NOTE: This error originates from subprocess, probably not an issue with pip.
Error: Metadata generation failed

× An error was encountered while generating package metadata.
╰─> Output see above.

NOTE: This is an issue with the package mentioned above, not pip.
Tip: See above for details.

In human terms, this error has nothing to do with PIP, and it is necessary to find the error of the original package.

Later, I searched and found that the highest version supported by PyQt is python3.9, so the installation of 3.11 will fail, and only the 3.9 version needs to be reinstalled.