QWidget: Must construct a QApplication before a QPaintDevice

[sot-iris]

Hi, I was able to run the test code listed in the documentation with the dummy numpy data on my windows VM, using a separate conda env with the samuroi dependencies. I was able to do this once. I did this using jupyter notebook. Any more run attempts brings about the error "QWidget: Must construct a QApplication before a QPaintDevice". Any advice would be appreciated. many thanks Sotiris