code: def uncheckButton(self):
          
          #for button in self.buttons[1:]:
          for button in self.buttons:
              # supress editButtons toggled event
              button.blockSignals(True)
              if button.isChecked():
                  button.setChecked(False)
              button.blockSignals(False)
docs: Removes the checked stated of all buttons in this widget.
  
          This method is also a slot.