code: def setOffPixmap(self, pixmap):
          
          pmap = QtGui.QPixmap(pixmap)
          self._offPixmap = pmap.scaled(self.width(), self.height(),
                                        QtCore.Qt.KeepAspectRatio,
                                        QtCore.Qt.SmoothTransformation)
docs: Sets the off pixmap that will be used for this button to the
          given pixmap.  This can be a QPixmap instance, or a string for where
          to load the pixmap from.
          
          :param      pixmap | <QtGui.QPixmap> || <str>