In [7]:
df
[
'OrderPeriod'
]
=
df
[
'OrderDate'
]
.
dt
.
strftime
(
'%Y-%m'
)
df
.
head
()
Out[7]:
OrderId
OrderDate
UserId
OrderPeriod
0
262
2009-01-11
47
2009-01
1
278
2009-01-20
47
2009-01
2
294
2009-02-03
47
2009-02
3
301
2009-02-06
47
2009-02
4
302
2009-02-06
47
2009-02