python编程开发之日期操作实例分析

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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。

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