(self)
Decreases volume.
Decreases volume.
Decreases volume .
def volume_down(self):
        """ Decreases volume. """
        if self.volume > 0:
            self.set_volume(max(self.volume-.1, 0))
def volume_down ( self ) : if self . volume > 0 : self . set_volume ( max ( self . volume - .1 , 0 ) )