# import datetime

    # import arrow

    def getTime(self, flag,dayhourminute):

        '''

        获取几小时之前,几分钟前，几天前，几个月前，及几年前的具体时间 flag, 1:天；2：小时；3：分钟；4：月，5：年

        :param flag: 1:天；2：小时；3：分钟；4：月，5：年

        :param dayhourminute: 整数值

        :return: 具体时间 %Y-%m-%d %H:%M:%S

        '''

        tn = datetime.datetime.now()

        t = None

        ttime =''

        if flag <= 1:

            if flag == 1:

                t = datetime.timedelta(days=dayhourminute)

            elif flag == 2:

                t = datetime.timedelta(hours=dayhourminute)

            elif flag == 3:

                t = datetime.timedelta(minutes=dayhourminute)

            strtime = tn - t

            ttime = strtime.strftime('%Y-%m-%d %H:%M:%S')

        else:

            dt = arrow.now()

            if flag == 4:

                ttime = dt.shift(months=-dayhourminute).format("YYYY-MM-DD HH:MM:SS")

            elif flag == 5:

                ttime = str(int(datetime.datetime.now().strftime("%Y"))-dayhourminute)+"-"+datetime.datetime.now().strftime("%m-%d")

        return  ttime