November 2022
Intermediate to advanced
392 pages
10h 8m
Chinese
Content preview from Python算法交易
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DatetimeIndex: 276331 entries, 2021-01-02 12:30:00 to 2021-01-05
17:15:30
Data columns (total 5 columns):
# Column Non-Null Count Dtype
--- ------ -------------- -----
0 No0 276331 non-null float64
1 No1 276331 non-null float64
2 No2 276331 non-null float64
3 No3 276331 non-null float64
4 No4 276331 non-null float64
dtypes: float64(5)
memory usage: 12.6 MB
In [102]: h5.close()
In [103]: rm data/*
定义开始日期和……
……数据获取操作的结束日期。
read_range()
方
法将开始日期和结束日期作为输入，在这里读取仅需几毫秒。
如前所述，可以将一天中获取到的新数据附加到
TsTables
表对象中。因此，当涉及
到随时间有效存储和获取（大量）金融时序数据集时，该软件包是 ...
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