datetime
import datetime
1. datetime.date
- 一个理想和的日期,提供 year, month, day 属性
>>> dt = datetime.date(2019, 12, 12)
>>> dt
datetime.date(2019, 12, 12)
>>> dt.year
2019
>>> dt.month
12
>>> dt.day
12
2. datetime.time
- 一个理想和的时间,提供 hour, minute, second, microsecond, tzinfo 属性
>>> datetime.time.fromisoformat('04:23:01')
datetime.time(4, 23, 1)
>>> datetime.time.fromisoformat('04:23:01.000384')
datetime.time(4, 23, 1, 384)
>>> datetime.time.fromisoformat('04:23:01+04:00')
datetime.time(4, 23, 1, tzinfo=datetime.timezone(datetime.timedelta(seconds=14400)))
from datetime import datetime, timedelta
3. datetime.datetime
>>> dt = datetime(2019, 12, 12)
>>> dt.today()
datetime.datetime(2019, 12, 12, 21, 54, 34, 746828)
>>> dt.now()
datetime.datetime(2019, 12, 12, 21, 54, 42, 291514)
4. datetime.timedelta
>>> t1 = datetime.now()
>>> t2 = timedelta(hours=1)
>>> (t1 + t2).strftime("%Y-%m-%d %H:%M:%S")
'2019-12-12 22:56:12'
补充
import datetime
from datetime import datetime
from datetime import datetime
import datetime
import datetime as dt
from datetime import datetime