[英]How can I subtract two date time values in a Pandas Dataframe
I'm working on a project and I need to subtract two date time values to get the number of days.我正在做一个项目,我需要减去两个日期时间值以获得天数。 A sample of the data can be seen below:
数据示例如下所示:
ALARM_DATE CONT_DATE \
0 2020/06/18 00:00:00+00 2020/06/23 00:00:00+00
1 2020/06/01 00:00:00+00 2020/06/04 00:00:00+00
2 2020/08/10 00:00:00+00 2020/03/01 00:00:00+00
3 2020/03/31 00:00:00+00 2020/04/01 00:00:00+00
4 2020/04/14 00:00:00+00 2020/04/19 00:00:00+00
... ... ...
I tried simply subtracting the values, but obviously that didn't work.我尝试简单地减去这些值,但显然那没有用。 Can anyone please help?
有人可以帮忙吗?
Convert your columns to actual dates first:首先将您的列转换为实际日期:
df['ALARM_DATE'] = pd.to_datetime(df['ALARM_DATE'])
df['CONT_DATE'] = pd.to_datetime(df['CONT_DATE'])
Or:或者:
df[['ALARM_DATE', 'CONT_DATE']] = df[['ALARM_DATE', 'CONT_DATE']].apply(pd.to_datetime)
Output: Output:
>>> df['CONT_DATE'] - df['ALARM_DATE']
0 5 days
1 3 days
2 -162 days
3 1 days
4 5 days
dtype: timedelta64[ns]
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