* 겪고 있는 문제 상황을 최대한 자세하게 작성해주세요.

* 문제 해결을 위해 어떤 시도를 해보았는지 구체적으로 함께 알려주세요.

(2) 시간 데이터 전처리 해주기 그대로 복사했는데 오류가 나요

#Pandas 사용 선언하기
import pandas as pd


#데이터 불러오기
sparta_data = pd.read_table('/content/done_detail.csv',sep=',')


format='%Y-%m-%dT%H:%M:%S.%f'
sparta_data['done_date_time'] = pd.to_datetime(sparta_data['done_date'], format=format)
sparta_data.tail(5)

---------------------------------------------------------------------------
ValueError                                Traceback (most recent call last)
<ipython-input-17-b5c96a9530de> in <cell line: 8>()
      6 
      7 format='%Y-%m-%dT%H:%M:%S.%f'
----> 8 sparta_data['done_date_time'] = pd.to_datetime(sparta_data['done_date'], format=format)
      9 sparta_data.tail(5)


2 frames
/usr/local/lib/python3.10/dist-packages/pandas/core/tools/datetimes.py in _array_strptime_with_fallback(arg, name, utc, fmt, exact, errors)
    517     Call array_strptime, with fallback behavior depending on 'errors'.
    518     """
--> 519     result, timezones = array_strptime(arg, fmt, exact=exact, errors=errors, utc=utc)
    520     if any(tz is not None for tz in timezones):
    521         return _return_parsed_timezone_results(result, timezones, utc, name)

strptime.pyx in pandas._libs.tslibs.strptime.array_strptime()

strptime.pyx in pandas._libs.tslibs.strptime.array_strptime()

ValueError: time data "2020-08-07 12:02:16" doesn't match format "%Y-%m-%dT%H:%M:%S.%f", at position 0. 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.