Hi,

I tried to use the newest tag 3.5.4. Everything worked but QRegularExpression is missing from PythonQt.QtCore. It was the only class which is missing, all other classes where available. I use Qt 5.11.x in one of my project, so I only tested with this version of Qt.
The last working tag was 3.4.2.

I was not able to track down the cause, but it seems that the restructuring (init for normal and builtin) from 3.5.x seems to be a reason because QRegularExpression is now in the builtin part. The generated_cpp has the calls for the registering, but not chance to import it at runtime.