3
由于DF怎样才能结合datetime.date和大熊猫数据帧datetime.time列?
Date Time Data
3 2017-08-10 15:15:00 a
0 2017-08-11 15:15:00 b
1 2017-08-12 15:15:00 c
2 2017-08-13 15:15:00 d
1 2017-08-14 15:15:00 e
而且
print (type(df['Date'].iat[0]))
<class 'datetime.date'>
print (type(df['Time'].iat[0]))
<class 'datetime.time'>
我怎么能结合df.Date和df.Time成DateTime列是一个DateTime对象??:
Date Time Data DateTime
3 2017-08-10 15:15:00 a 2017-08-10 15:15:00
0 2017-08-11 15:15:00 b 2017-08-11 15:15:00
1 2017-08-12 15:15:00 c 2017-08-12 15:15:00
2 2017-08-13 15:15:00 d 2017-08-13 15:15:00
1 2017-08-14 15:15:00 e 2017-08-14 15:15:00
什么我想:
df['DateTime'] = df.apply(lambda r : pd.datetime.combine(r['Date'],r['Time']),1)
这工作以及预期的,但是,我宁愿一个量化操作,我得到了以下信息:
C:\Users\User\Anaconda3\lib\site-packages\ipykernel\__main__.py:1:
SettingWithCopyWarning:
A value is trying to be set on a copy of a slice from a DataFrame.
Try using .loc[row_indexer,col_indexer] = value instead
See the caveats in the documentation: http://pandas.pydata.org/pandas-
docs/stable/indexing.html#indexing-view-versus-copy
if __name__ == '__main__':
我以前试过这种更有效的,但我得到:“类型错误:不支持的操作数类型(S)为+:“日期时间.date”和‘海峡’” – hernanavella
我测试和它的工作,什么版本是你吗?你也可以尝试另一种方法,我添加 – Vaishali
替代形式给了我这样的:类型错误:不支持的操作数类型(S)为+:“datetime.date”和“datetime.time” – hernanavella