def _init   ():  # 初始化
    global _global_dict
    _global_dict = {}


def set_value(key, value):
    #   定义一个全局变量
    _global_dict[key] = value


def get_value(key):
    #   获得一个全局变量，不存在则提示读取对应变量失败
    try:
        return _global_dict[key]
    except:
        print('Read'+key+'Fail\r\n')
