📅  最后修改于: 2022-03-11 14:45:38.663000             🧑  作者: Mango
#column name ISSDTM
pd.to_datetime(df.ISSDTM, errors='coerce').dt.year
#result
0 2013
1 2013
2 2009
3 2009
Name: ISSDTM, dtype: int64