我正在学习使用Backtrader，但在打印数据时遇到了一个问题，它正确地打印了日、开盘、最高价、最低价、收盘和成交量，但每一行的小时和分钟数据似乎都默认为23：59：59.999989。
以下是数据源的示例：

datetime,open,high,low,close,volume,,
11/2/2020 9:30,330.187,330.188,329.947,330.038,4.79,,
11/2/2020 9:31,330.038,330.438,329.538,329.677,5.49,,
11/2/2020 9:32,329.667,330.248,329.577,330.117,5.8,,
11/2/2020 9:33,330.128,330.328,329.847,329.948,5.59,,
11/2/2020 9:34,329.967,330.308,329.647,329.698,6.24,,

我用来向backtrader添加数据的代码是：

data = bt.feeds.GenericCSVData(
    dataname = 'SPY_11_2020_1M.txt',
    name= 'SPY',
    datetime = 0,
    dtformat = ('%m/%d/%Y %H:%M'),
    period = bt.TimeFrame.Ticks,
    compression = 1,
    fromdate = params['fromdate'], 
    todate = params['todate'],
    open = 1,
    high = 2,
    low = 3,
    close = 4,
    volume = 5,
    openinterest = -1,
    )
cerebro.adddata(data)

我的策略代码，是一个简单的买入并持有策略，是：

import backtrader as bt
from datetime import datetime as dt

class BuyHold(bt.Strategy):

    def __init__(self):
        # self.time = self.datas[0].datetime.datetime(0),
        self.open = self.datas[0].open
        self.high = self.datas[0].high
        self.low = self.datas[0].low
        self.close = self.datas[0].close
        self.volume = self.datas[0].volume

    def next(self):
        print('{0} {1}\t{2}\t{3}\t{4}\t{5}\t{6}'.format(
            self.datas[0].datetime.date(0),
            self.datas[0].datetime.time(0),
            self.open[0],
            self.high[0],
            self.low[0],
            self.close[0],
            self.volume[0]
            ))

       # print('{0}\t{1}\t{2}\t{3}\t{4}\t{5}'.format(
        #     self.time,
        #     self.open[0],
        #     self.high[0],
        #     self.low[0],
        #     self.close[0],
        #     self.volume[0]
        #     ))

        if self.position.size == 0:
            size = int(self.broker.getcash() / self.data)
            self.buy(size = size)

我得到的打印输出是：

2020-11-02 23:59:59.999989      330.187 330.188 329.947 330.038 4.79
2020-11-02 23:59:59.999989      330.038 330.438 329.538 329.677 5.49
2020-11-02 23:59:59.999989      329.667 330.248 329.577 330.117 5.8
2020-11-02 23:59:59.999989      330.128 330.328 329.847 329.948 5.59
2020-11-02 23:59:59.999989      329.967 330.308 329.647 329.698 6.24

我还尝试了注解掉的self.time和注解掉的print行，这提供了类似的结果，但格式略有不同，如下所示：

(datetime.datetime(2020, 11, 2, 23, 59, 59, 999989),)   330.187 330.188 329.947 330.038 4.79
(datetime.datetime(2020, 11, 2, 23, 59, 59, 999989),)   330.038 330.438 329.538 329.677 5.49
(datetime.datetime(2020, 11, 2, 23, 59, 59, 999989),)   329.667 330.248 329.577 330.117 5.8
(datetime.datetime(2020, 11, 2, 23, 59, 59, 999989),)   330.128 330.328 329.847 329.948 5.59
(datetime.datetime(2020, 11, 2, 23, 59, 59, 999989),)   329.967 330.308 329.647 329.698 6.24
(datetime.datetime(2020, 11, 2, 23, 59, 59, 999989),)   329.698 330.198 329.568 329.948 6.51

我不知道我错过了什么。