New comment by sgn on void-packages repository

https://github.com/void-linux/void-packages/pull/24182#issuecomment-671300034

Comment:
ArchLinux ships PyQt5 5.15 for Python 2, too.
But, the PyPi site and the code put the requirements for Python 3.5.
I didn't check PyQt5's source code carefully, but `sip5` and some `sip` files contains Python 3 only code.