1 # -*- coding: utf-8 -*- 2 3 from datetime import datetime 4 import time 5 6 # 取当前时间，返回string类型 7 now_str = time.strftime("%Y-%m-%d %H:%M:%S") 8 print (type(now_str)) 9 print now_str 10 print '---' 11 12 # 取当前时间,返回datetime类型 13 print (type(datetime.now())) 14 print datetime.now() 15 print '---' 16 17 # string -> datetime 18 time_type = datetime.strptime(now_str, "%Y-%m-%d %H:%M:%S") 19 print type(time_type) 20 print time_type 21 print '---' 22 23 # datetime -> string 24 str_type = datetime.strftime(time_type, "%Y-%m-%d %H:%M:%S") 25 print type(str_type) 26 print str_type 27 28 #计算时间间隔 29 starttime = datetime.now() 30 endtime = datetime.now() 31 print (endtime - starttime).seconds 32 33 # 构造datetime对象 34 new_dt = datetime(2005, 2, 16) 35 print type(new_dt) 36 print new_dt 37 38 # 日期计算,这里需要datetime，而不是datetime.datetime 39 yesterday_date = datetime.datetime.now() - datetime.timedelta(days=1) 40 yesterday_str = datetime.datetime.strftime(yesterday_date, "%Y%m%d")