日期Dates时间Times

1 import datetime as dt
2 import time as tm

%时间从纪元开始以秒为单位返回当前时间。（1970年1月1日）
1 tm.time()

1520242063.03

1 dtnow = dt.datetime.fromtimestamp(tm.time())
2 dtnow

datetime.datetime(2018, 3, 5, 9, 27, 54, 629264)

1 dtnow.year, dtnow.month, dtnow.day, dtnow.hour, dtnow.minute, dtnow.second # get year, month, day, etc.from a datetime

(2018, 3, 5, 9, 27, 54)

%timedelta是持续表达两个日期之间的差异。
1 delta = dt.timedelta(days = 100) # create a timedelta of 100 days
2 delta

datetime.timedelta(100)

%date.today()返回当前的时间
1 today = dt.date.today()
2 today - delta # the date 100 days ago

datetime.date(2017, 11, 25)

1 today > today-delta # compare dates

True

转载于:https://www.cnblogs.com/zhengzhe/p/8510974.html