(self, color=None)
Set canvas' backgroundcolor if color is not None,
        else return backgroundcolor.
Set canvas' backgroundcolor if color is not None,
        else return backgroundcolor.
Set canvas backgroundcolor if color is not None else return backgroundcolor .
def _bgcolor(self, color=None):
        """Set canvas' backgroundcolor if color is not None,
        else return backgroundcolor."""
        if color is not None:
            self.cv.config(bg = color)
            self._update()
        else:
            return self.cv.cget("bg")
def _bgcolor ( self , color = None ) : if color is not None : self . cv . config ( bg = color ) self . _update ( ) else : return self . cv . cget ( "bg" )