将Pandas DataFrame中的日期对象列转换为字符串
问题描述：
如何将由datetime64对象组成的列转换为今天11月1日的
01-11-2013的字符串。
How to convert a column consisting of datetime64 objects to a strings that would read 01-11-2013 for today's date of November 1.
I尝试
df['DateStr'] = df['DateObj'].strftime('%d%m%Y')
但是我收到这个错误
AttributeError：'Series'对象没有属性'strftime'
答
In [6]: df = DataFrame(dict(A = date_range('20130101',periods=10)))
In [7]: df
Out[7]:
A
0 2013-01-01 00:00:00
1 2013-01-02 00:00:00
2 2013-01-03 00:00:00
3 2013-01-04 00:00:00
4 2013-01-05 00:00:00
5 2013-01-06 00:00:00
6 2013-01-07 00:00:00
7 2013-01-08 00:00:00
8 2013-01-09 00:00:00
9 2013-01-10 00:00:00
In [8]: df['A'].apply(lambda x: x.strftime('%d%m%Y'))
Out[8]:
0 01012013
1 02012013
2 03012013
3 04012013
4 05012013
5 06012013
6 07012013
7 08012013
8 09012013
9 10012013
Name: A, dtype: object