code: def do_disconnect(self, arg):
          ''' Disconnect from the arm. '''
          if not self.arm.is_connected():
              print(self.style.error('Error: ', 'Arm is already disconnected.'))
          else:
              self.arm.disconnect()
              print(self.style.success('Success: ', 'Disconnected.')f do_disconnect(self, arg):
          ''' Disconnect from the arm. '''
          if not self.arm.is_connected():
              print(self.style.error('Error: ', 'Arm is already disconnected.'))
          else:
              self.arm.disconnect()
              print(self.style.success('Success: ', 'Disconnected.'))
docs: Disconnect from the arm.