# -*- coding:UTF-8 -*-
import datetime, time
now = datetime.datetime.now()
print "日期輸出格式化 datetime => string"
print now.strftime('%Y-%m-%d %H:%M:%S')
t_str = '2015-04-07 19:11:21'
d = datetime.datetime.strptime(t_str, '%Y-%m-%d %H:%M:%S')
print "字符串輸出格式化string => datetime"
print d
d1 = datetime.datetime.strptime('2015-03-05 17:41:20', '%Y-%m-%d %H:%M:%S')
d2 = datetime.datetime.strptime('2015-03-02 17:41:20', '%Y-%m-%d %H:%M:%S')
delta = d1 - d2
print "兩個日期相差多少天"
print delta.days
now = datetime.datetime.now()
delta = datetime.timedelta(days=3)
n_days = now + delta
print "今天的n天后的日期"
print n_days.strftime('%Y-%m-%d %H:%M:%S')