[PyQt] pyqtProperty type error

[Sietse]

Hello list,

I am porting qt5/qtconnectivity/examples/lowenertyscanner to pyqt5.
It can be found in  on github <https://github.com/SietseAchterop/BLE_pyqt5>  
in *main.py*
There are 2 very similar uses of pyqtProperty, the first is working, the
second (servicesList) gives the following error:

The question is, why is the second use giving an error?

Both properties are used in the same way as a model in a ListView in
main.qml and Service.qml respectively.
The relevant code snippets:
 
The last 2 return lists of DeviceInfo and ServiceInfo respectively:

Hopefully someone can help.
Thanks in advance, Sietse







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