提取两个日期,结果为秒(熊猫)

时间:2015-10-01 08:42:43

标签: python pandas

我想提取两个日期并在几秒钟内显示结果。我这样做:

dftask['TimeWindowDuration'] = dftask['LatestEnd'] - dftask['EarliestStart']

LatestEnd和EarliestStart都是:datetime64[ns]

相应的输出数据帧:

    LatestEnd   EarliestStart   TimeWindowDuration
27-7-2015 22:57 27-7-2015 22:14 0 days 00:43:00.000000000
28-7-2015 6:20  28-7-2015 1:50  0 days 04:30:00.000000000
28-7-2015 6:45  27-7-2015 20:32 0 days 10:13:00.000000000
28-7-2015 7:00  27-7-2015 21:47 0 days 09:13:00.000000000
28-7-2015 6:15  28-7-2015 1:45  0 days 04:30:00.000000000

如何指定TimeWindowDuration是以秒为单位? unit='s'

感谢您的帮助!

1 个答案:

答案 0 :(得分:2)

尝试将timedelta.total_seconds()用作:

dftask['TimeWindowDuration'].total_seconds()

示例:

d1 = datetime(2015, 10, 1, 10, 56, 21)
d2 = datetime(2015, 10, 1, 10, 58, 21)
d3 = d2-d1

In [21]: d3.total_seconds()
Out[21]: 120.0

编辑:

让:

In [5]: import pandas as pd

In [6]: a = pd.to_timedelta('0 days 00:43:00.000000000',unit='s')

In [7]: a
Out[7]: Timedelta('0 days 00:43:00')

In [8]: a.total_seconds()
Out[8]: 2580.0

希望有所帮助。

编辑2:

在您的数据框中:

dftask['TimeWindowDuration'] = (dftask['LatestEnd'] - dftask['EarliestStart']).dt.seconds

请记住阅读数据框或使用parse_dates=['LatestEnd','EarliestStart']将列解析为日期。