python 函数返回多个参数的赋值方法

#定义函数

def Get_Counter_AllMeasureValue(self, inst_dg_address):
    """
    get all measure value ,as Frequency,period,duty,+width,-width,and so on...

    :param inst_dg_address:
    :return: Frequency,period,duty,+width,-width
    :return:  all return value is  string
    """
    Frequency = 0.0
    period = 0.0
    duty = 0.0
    p_width = 0.0
    n_th = 0.0

    rm1 = visa.ResourceManager();
    ret = -9.0
    try:
        mi_1 = rm1.open_resource(inst_dg_address);
    except:
        rt_error("In DG_Counter_CMD.py DG：Get_Counter_Sensitive, open element1 resource error: %s" % inst_dg_address);
        return False;
    # 实际执行部分
    mi_1.timeout = 10000;
    ret = mi_1.query(':COUNter:MEASure?')
    mi_1.close();
    frequency = ret[:15]
    period = ret[16:31]
    duty = ret[32:47]
    p_width = ret[48:63]
    n_width = ret[64:79]
    return frequency,period,duty,p_width,n_width
获得函数的返回值方法：

frq,perid,duty,p_wid,n_wid = DG_CMD.Get_Counter_AllMeasureValue(dut_dg_address)

另外，debug调试的时候发现return 返回值是tuple 元组类型的，因此有多个返回值的 也可以通过元组的方式访问各个元组中的元素，
因为元组的元素不能修改，因此也印证了为什么函数返回值是元组的原因了