[Qgis-developer] Do Python plugins already work with QGIS 3?

[Andreas Neumann]

Hi,

I compiled and installed QGIS 3 - which worked fine. But at start of 
QGIS, none of the Python plugins seem to work, e.g. processing, 
db-manager, etc. all fail.

Is this expected behaviour or is there something in my compile settings 
that would make these Python "core" plugins work in QGIS 3.0 on Python 3?

Thanks,

Andreas