* 겪고 있는 문제 상황을 최대한 자세하게 작성해주세요.

* 문제 해결을 위해 어떤 시도를 해보았는지 구체적으로 함께 알려주세요.

그대로 복붙했는데

오류가 납니다.. 왜이러죠?

작성한 코드 및 에러 메세지

format='%Y-%m-%d %H:%M:%S'
sparta_data['access_date_time'] = pd.to_datetime(sparta_data['access_date'], format=format)
sparta_data.tail(5)

ValueError                                Traceback (most recent call last)
Cell In[29], line 2
      1 format='%Y-%m-%d %H:%M:%S'
----> 2 sparta_data['access_date_time'] = pd.to_datetime(sparta_data['access_date'], format=format)
      3 sparta_data.tail(5)

File c:\Users\still\AppData\Local\Programs\Python\Python312\Lib\site-packages\pandas\core\tools\datetimes.py:1112, in to_datetime(arg, errors, dayfirst, yearfirst, utc, format, exact, unit, infer_datetime_format, origin, cache)
   1110         result = arg.map(cache_array)
   1111     else:
-> 1112         values = convert_listlike(arg._values, format)
   1113         result = arg._constructor(values, index=arg.index, name=arg.name)
   1114 elif isinstance(arg, (ABCDataFrame, abc.MutableMapping)):

File c:\Users\still\AppData\Local\Programs\Python\Python312\Lib\site-packages\pandas\core\tools\datetimes.py:488, in _convert_listlike_datetimes(arg, format, name, utc, unit, errors, dayfirst, yearfirst, exact)
    486 # `format` could be inferred, or user didn't ask for mixed-format parsing.
    487 if format is not None and format != "mixed":
--> 488     return _array_strptime_with_fallback(arg, name, utc, format, exact, errors)
    490 result, tz_parsed = objects_to_datetime64ns(
    491     arg,
    492     dayfirst=dayfirst,
   (...)
    496     allow_object=True,
    497 )
    499 if tz_parsed is not None:
...

ValueError: time data "2020.8.3 0:00" doesn't match format "%Y-%m-%d %H:%M:%S", at position 226. You might want to try:
    - passing `format` if your strings have a consistent format;
    - passing `format='ISO8601'` if your strings are all ISO8601 but not necessarily in exactly the same format;
    - passing `format='mixed'`, and the format will be inferred for each element individually. You might want to use `dayfirst` alongside this.