def QA_util_if_tradetime(
        _time=datetime.datetime.now(),
        market=MARKET_TYPE.STOCK_CN,
        code=None
):
    '时间是否交易'
    _time = datetime.datetime.strptime(str(_time)[0:19], '%Y-%m-%d %H:%M:%S')
    if market is MARKET_TYPE.STOCK_CN:
        if QA_util_if_trade(str(_time.date())[0:10]):
            if _time.hour in [10, 13, 14]:
                return True
            elif _time.hour in [
                    9
            ] and _time.minute >= 15:  # 修改成9:15 加入 9:15-9:30的盘前竞价时间
                return True
            elif _time.hour in [11] and _time.minute <= 30:
                return True
            else:
                return False
        else:
            return False
    elif market is MARKET_TYPE.FUTURE_CN:                              
        date_today=str(_time.date())    
        date_yesterday=str((_time-datetime.timedelta(days=1)).date())                         
        
        is_today_open=QA_util_if_trade(date_today)
        is_yesterday_open=QA_util_if_trade(date_yesterday)
        
        #考虑周六日的期货夜盘情况
        if is_today_open==False: #可能是周六或者周日
            if is_yesterday_open==False or (_time.hour > 2 or _time.hour == 2 and _time.minute > 30):
                return False

        shortName = ""                      # i , p
        for i in range(len(code)):
            ch = code[i]
            if ch.isdigit():                # ch >= 48 and ch <= 57:
                break
            shortName += code[i].upper()

        period = [
            [9, 0, 10, 15],
            [10, 30, 11, 30],
            [13, 30, 15, 0]
        ]
        
        if (shortName in ["IH", 'IF', 'IC']):
            period = [
                [9, 30, 11, 30],
                [13, 0, 15, 0]
            ]
        elif (shortName in ["T", "TF"]):
            period = [
                [9, 15, 11, 30],
                [13, 0, 15, 15]
            ]
        
        if 0<=_time.weekday<=4:
            for i in range(len(period)):
                p = period[i]
                if ((_time.hour > p[0] or (_time.hour == p[0] and _time.minute >= p[1])) and (_time.hour < p[2] or (_time.hour == p[2] and _time.minute < p[3]))):
                    return True

        #最新夜盘时间表_2019.03.29
        nperiod = [
            [
                ['AU', 'AG', 'SC'],
                [21, 0, 2, 30]  
            ],
            [
                ['CU', 'AL', 'ZN', 'PB', 'SN', 'NI'],
                [21, 0, 1, 0]   
            ],
            [
                ['RU', 'RB', 'HC', 'BU','FU','SP'],
                [21, 0, 23, 0]
            ],
            [
                ['A', 'B', 'Y', 'M', 'JM', 'J', 'P', 'I', 'L', 'V', 'PP', 'EG', 'C', 'CS'],
                [21, 0, 23, 0]
            ],
            [
                ['SR', 'CF', 'RM', 'MA', 'TA', 'ZC', 'FG', 'IO', 'CY'],
                [21, 0, 23, 30]
            ],
        ]

        for i in range(len(nperiod)):
            for j in range(len(nperiod[i][0])):
                if nperiod[i][0][j] == shortName:
                    p = nperiod[i][1]
                    condA = _time.hour > p[0] or (_time.hour == p[0] and _time.minute >= p[1])
                    condB = _time.hour < p[2] or (_time.hour == p[2] and _time.minute < p[3])
                    # in one day
                    if p[2] >= p[0]:
                        if ((_time.weekday >= 0 and _time.weekday <= 4) and condA and condB):
                            return True
                    else:
                        if (((_time.weekday >= 0 and _time.weekday <= 4) and condA) or ((_time.weekday >= 1 and _time.weekday <= 5) and condB)):
                            return True
                    return False
        return False