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:

#datetime
import 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 datetime
time_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 - day
print(\'{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 = 4
now = datetime.datetime.now()
my_date = datetime.timedelta(days=n_days) 
n_day = now + my_date
print(\'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 win32
Type \"copyright\", \"credits\" or \"license()\" for more information.
>>> ================================ RESTART ================================
>>> 
2013-07-29 01:48:16
2013-07-29
2013-07-29 01:05:00
2013-07-29 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。