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我尝试delete一些列并在列中转换一些值

df2.drop(df2.columns[[0, 1, 3]], axis=1, inplace=True)
df2['date'] = df2['date'].map(lambda x: str(x)[1:])
df2['date'] = df2['date'].str.replace(':', ' ', 1)
df2['date'] = pd.to_datetime(df2['date'])

我得到的所有这些字符串

  df2.drop(df2.columns[[0, 1, 3]], axis=1, inplace=True)
C:/Users/????? ???????????/Desktop/projects/youtube_log/filter.py:11: SettingWithCopyWarning: 
A value is trying to be set on a copy of a slice from a DataFrame.
Try using .loc[row_indexer,col_indexer] = value instead

那有什么问题？