def new_actuator(self):
    self.num_actuators += 1
    global n_actuators
    n_actuators = self.num_actuators
    return (self.num_actuators - 1)
def new_actuator(self):
    self.num_actuators += 1
    global n_actuators
    n_actuators = self.num_actuators
    return (self.num_actuators - 1)