def close(self):
        """Close the contacless reader device."""
        with self.lock:
            if self.device is not None:
                try:
                    self.device.close()
                except IOError:
                    pass
                self.device = None
def close ( self ) : with self . lock : if self . device is not None : try : self . device . close ( ) except IOError : pass self . device = None
Close the contacless reader device.