datetime模塊包括一些函數和類，用於完成日期和時間的解析、格式化和相關的運行
#!/usr/bin/env python #coding: utf-8 import datetime t = datetime.time(1,2,3) print t #01:02:03 print t.hour #1 print t.minute #2 print t.second #3 print t.microsecond #0 print t.tzinfo #None print datetime.time.min #00:00:00 print datetime.time.max #23:59:59.999999 print datetime.time.resolution #0:00:00.000001 分辨率限制爲整毫秒 today = datetime.date.today() print today #2016-09-26 print today.ctime() #Mon Sep 26 00:00:00 2016 t1 = today.timetuple() print t1.tm_year,t1.tm_mon,t1.tm_mday #2016 9 26 print today.year,today.month,today.day #2016 9 26 one_day = datetime.timedelta(days=1) print one_day #1 day, 0:00:00 yesterday = today - one_day print yesterday #2016-09-25 tomorrow = today + one_day print tomorrow #2016-09-27 print tomorrow - yesterday #2 days, 0:00:00 print yesterday - tomorrow #-2 days, 0:00:00 print datetime.datetime.now() #2016-09-26 21:40:49.278000 print datetime.datetime.today() #2016-09-26 21:40:49.278000 print datetime.datetime.utcnow() #2016-09-26 13:40:49.278000 today = datetime.datetime.today() format = "%a %b %d %H:%M:%S %Y" print today #2016-09-26 21:44:27.670000 s = today.strftime(format) print s #Mon Sep 26 21:44:27 2016 d = datetime.datetime.strptime(s,format) print d.strftime(format) #Mon Sep 26 21:46:18 2016