과제 하는 중, 요일을 추가하는 항목에서 계속 아래의 오류가 발생 합니다.

---------------------------------------------------------------------------
AttributeError                            Traceback (most recent call last)
<ipython-input-94-f6d405f30671> in <cell line: 19>()
     17 weeks = ['Monday' 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday', 'Sunday']
     18 weekdata = sparta_data.groupby('done_date_time_weekday')['user_id'].count()
---> 19 weekdata = weekdata.agg(weeks)
     20 weekdata
     21 

8 frames

/usr/local/lib/python3.10/dist-packages/pandas/core/apply.py in _try_aggregate_string_function(self, obj, arg, *args, **kwargs)
    576             return f(obj, *args, **kwargs)
    577 
--> 578         raise AttributeError(
    579             f"'{arg}' is not a valid function for '{type(obj).__name__}' object"
    580         )

AttributeError: 'MondayTuesday' is not a valid function for 'Series' object