python - QPainter::begin: Paint device returned engine == 0, type: 0 -

i started watching tutorials python , qt (https://www.youtube.com/watch?v=eq7__6y0jwo&index=3&list=pl19dciiwvefyqxldtwlxq4lnzdpw6_r-q) i'm getting error "qpainter::begin: paint device returned engine == 0, type: 0" , can't figure out why. idea want have window works in 3dsmax, modo , maybe standalone (both 3dsmax , modo come pyside).

any ideas?

here code:

from pyside import qtcore, qtgui import sys  class palettelistmodel (qtcore.qabstractlistmodel):     def __init__(self, colors=[], parent=none):         qtcore.qabstractlistmodel.__init__(self, parent)         self._colors = colors   if __name__ == '__main__':     app = qtgui.qapplication(sys.argv)      listview = qtgui.qlistview()     listview.show()      red = qtgui.qcolor(255, 0, 0)     green = qtgui.qcolor(0, 255, 0)     blue = qtgui.qcolor(0, 0, 255)      model = palettelistmodel([red, green, blue])      listview.setmodel(model)      sys.exit(app.exec_()) 

thanks,

nick

the thing see wrong code inheriting qabstractlistmodel without implementing abstract methods.

from documentation here: http://doc.qt.io/qt-5/qabstractlistmodel.html#details

when subclassing qabstractlistmodel, must provide implementations of rowcount() , data() functions. behaved models provide headerdata() implementation.

are leaving out code? ever create qpainter object?