pandas convert date/time to week

[okl]

Hi

Below error when trying to convert date/time to week

data.columns
data.index
data['DATECREATED'].dt.week

Error:
---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
~\AppData\Local\Continuum\anaconda3\lib\site-packages\pandas\core\series.py in _make_dt_accessor(self)
   2819         try:
-> 2820             return maybe_to_datetimelike(self)
   2821         except Exception:

~\AppData\Local\Continuum\anaconda3\lib\site-packages\pandas\core\indexes\accessors.py in maybe_to_datetimelike(data, copy)
     83     raise TypeError("cannot convert an object of type {0} to a "
---> 84                     "datetimelike index".format(type(data)))
     85 

TypeError: cannot convert an object of type <class 'pandas.core.series.Series'> to a datetimelike index

During handling of the above exception, another exception occurred:

AttributeError                            Traceback (most recent call last)
<ipython-input-35-dedf61725963> in <module>()
     14 data.columns
     15 data.index
---> 16 data['DATECREATED'].dt.week
     17 

~\AppData\Local\Continuum\anaconda3\lib\site-packages\pandas\core\generic.py in __getattr__(self, name)
   3075         if (name in self._internal_names_set or name in self._metadata or
   3076                 name in self._accessors):
-> 3077             return object.__getattribute__(self, name)
   3078         else:
   3079             if name in self._info_axis:

~\AppData\Local\Continuum\anaconda3\lib\site-packages\pandas\core\base.py in __get__(self, instance, owner)
    241             # this ensures that Series.str.<method> is well defined
    242             return self.accessor_cls
--> 243         return self.construct_accessor(instance)
    244 
    245     def __set__(self, instance, value):

~\AppData\Local\Continuum\anaconda3\lib\site-packages\pandas\core\series.py in _make_dt_accessor(self)
   2820             return maybe_to_datetimelike(self)
   2821         except Exception:
-> 2822             raise AttributeError("Can only use .dt accessor with datetimelike "
   2823                                  "values")
   2824 

AttributeError: Can only use .dt accessor with datetimelike values

data['DATECREATED']

Output:
0              26/01/2018
4              23/01/2018
13       07/02/2018 17:35
14             27/01/2018
15             29/01/2018
20             24/01/2018
27       07/02/2018 09:57
31       05/02/2018 11:26