def OnChanged(self, widget : QtGui.QRadioButton, fn):
     self.__CheckType(widget)
     for obj in widget.children():
         if self.__IsRadioBtn(obj): obj.clicked.connect(fn)    
 def __RadioButtonCount(self, widget : QtGui.QRadioButton) -> int:
     res = 0
     for obj in widget.children():
         if self.__IsRadioBtn(obj): res += 1
     return res