#this happens on Kivy 1.9.0 for Windows.

pyglop __init__ finished
[ KivyGlop ] ERROR--__init__ could not finish super!
<class 'TypeError'> 'dict' object is not callable:
   File "T:\pcerruti2020\Programming\Open GL\kivyglops.py", line 105, in __init__
     super(KivyGlop, self).__init__()  # only does class inherited FIRST (see class line above)
   File "C:\kivy\kivy34\kivy\uix\widget.py", line 261, in __init__
     super(Widget, self).__init__(**kwargs)
   File "kivy\_event.pyx", line 252, in kivy._event.EventDispatcher.__init__ (kivy\_event.c:4571)
   File "kivy\_event.pyx", line 777, in kivy._event.EventDispatcher.properties (kivy\_event.c:8189)