熊猫DateTime Apply方法给出了错误''Timestamp''对象没有属性'dt''

Question

data ['TS']。dt.second有效，但不适用于Apply函数。

data['TS'] # dtype: datetime64[ns]

  

0 2019-06-27 10:13:25

     

1 2019-06-27 10:13:08

     

2 2019-06-27 10:11:53

data['TS'].dt.second

  

0 25

     

1 8

     

2 53

但是

from datetime import timedelta
def myTimeFun(tsRow):
    addSec=0 # or some Value
    thisSec=tsRow.dt.second
    return  tsRow + timedelta(seconds=addSec)

data['TS'].apply(myTimeFun)

错误：

---------------------------------------------------------------------------
AttributeError                            Traceback (most recent call last)
<ipython-input-130-9a000b768604> in <module>
----> 1 data['TS_Apx30Sec'] = data['TS'].apply(myTimeFun)
      2 data['TS_Apx30Sec']

~\AppData\Local\conda\conda\envs\py370\lib\site-packages\pandas\core\series.py in apply(self, func, convert_dtype, args, **kwds)
   4036             else:
   4037                 values = self.astype(object).values
-> 4038                 mapped = lib.map_infer(values, f, convert=convert_dtype)
   4039 
   4040         if len(mapped) and isinstance(mapped[0], Series):

pandas\_libs\lib.pyx in pandas._libs.lib.map_infer()

<ipython-input-125-dc9c61ebdaa8> in timeApprx30Sec(tsRow)
      3 def myTimeFun(tsRow):
      4     addSec=0
----> 5     thisSec=tsRow.dt.second

AttributeError: 'Timestamp' object has no attribute 'dt'

Answer 1

thisSec=tsRow.second #Works & Solved

def myTimeFun(tsRow):
    addSec=0 # or some Value
    thisSec=tsRow.second #thisSec=tsRow.dt.second
    return  tsRow + timedelta(seconds=addSec)

不确定为什么不thisSec=tsRow.dt.second和data['TS'].dt.second一样有效 如果有人对此发表评论是适用的。