本文实例讲述了python编程开发之日期操作。分享给大家供大家参考，具体如下：
在python中对日期进行操作的库有：
import datetime
import time
对日期格式化信息，可以参考官方api：
time.strftime
datetime
下面是我做的demo：
#datetimeimport datetime#当前日期now = datetime.datetime.now()print(now.strftime('%y-%m-%d %h:%m:%s'))print(now.strftime('%y-%m-%d'))#string convert to datetimetime_str = '2013-07-29 01:05:00'str_convert_2_time = datetime.datetime.strptime(time_str, '%y-%m-%d %h:%m:%s')print(str_convert_2_time)#比较两个日期相差多少天time_stra = '2013-07-29 01:05:00'time_strb ='2013-08-29 01:05:00' day = datetime.datetime.strptime(time_stra, '%y-%m-%d %h:%m:%s')day2 = datetime.datetime.strptime(time_strb, '%y-%m-%d %h:%m:%s')sub_day = day2 - dayprint('{0}和{1}相差{2}天'.format(time_stra, time_strb, str(sub_day.days)))#今后的n天的日期n_days = 4now = datetime.datetime.now()my_date = datetime.timedelta(days=n_days) n_day = now + my_dateprint('从今天起的{0}天的日期是：'.format(n_days))print(n_day.strftime('%y-%m-%d %h:%m:%s'))
运行效果：
python 3.3.2 (v3.3.2:d047928ae3f6, may 16 2013, 00:03:43) [msc v.1600 32 bit (intel)] on win32type copyright, credits or license() for more information.>>> ================================ restart ================================>>> 2013-07-29 01:48:162013-07-292013-07-29 01:05:002013-07-29 01:05:00和2013-08-29 01:05:00相差31天从今天起的4天的日期是：2013-08-02 01:48:16>>>
希望本文所述对大家python程序设计有所帮助。