Is pyqt5-sip still required for pyqt5 with sip5+ and pyqt-builder?

[Sandro Mani]

>> Is this an issue with building PyQt5, or is pyqt5-sip still required
>> also when building with sip5+?
>
> The build of the sip module for PyQt5 is separate to the build of PyQt5.

Right, but is it expected that the sip module needs to be installed to 
import PyQt5.QtCore?

Thanks
Sandro