py-sip has broken API
The APKBUILD for py-sip builds/installs it with the old module name:
$python configure.py --sip-module PyQt5.sip
This breaks any software expecting to find it with the modern name “sip”. It should be installed with both names for compatibility with old and new applications.
(from redmine: issue id 10529, created on 2019-05-31)