python - 使用python从时间戳中提取小时

Question

我有一个数据框 df_energy2

df_energy2.info()
<class 'pandas.core.frame.DataFrame'>
RangeIndex: 29974 entries, 0 to 29973
Data columns (total 4 columns):
TIMESTAMP        29974 non-null datetime64[ns]
P_ACT_KW         29974 non-null int64
PERIODE_TARIF    29974 non-null object
P_SOUSCR         29974 non-null int64
dtypes: datetime64[ns](1), int64(2), object(1)
memory usage: 936.8+ KB

采用这种结构:

df_energy2.head()

TIMESTAMP P_ACT_KW PERIODE_TARIF P_SOUSCR
2016-01-01 00:00:00 116 HC 250 
2016-01-01 00:10:00 121 HC 250

有没有python函数可以从TIMESTAMP中提取小时？

亲切的问候

Answer 1

我想你需要dt.hour :

print (df.TIMESTAMP.dt.hour)
0    0
1    0
Name: TIMESTAMP, dtype: int64

df['hours'] = df.TIMESTAMP.dt.hour
print (df)
            TIMESTAMP  P_ACT_KW PERIODE_TARIF  P_SOUSCR  hours
0 2016-01-01 00:00:00       116            HC       250      0
1 2016-01-01 00:10:00       121            HC       250      0