Python 按月增加datetime月份的问题，pythondatetime,今天要为大家收集分享的P

Python 按月增加datetime月份的问题，pythondatetime,今天要为大家收集分享的P

今天要为大家收集分享的Python学习代码为：Python 按月增加datetime月份的问题源码。可能有同学看不明白什么是Python 按月增加datetime？其实简单的理解python datetime增加月份的问题，就是一些人的日常工作是需要对月份加减进行相关操作计算。

DateTime是什么：DateTime是时间类型，datetime是Python处理日期和时间的标准库。还有python time模块

Python 按月增加datetime月份的问题源码如下：（Python源码中注释部分多为英文，大家可自行翻译）

#coding=utf-8import datetime# input datetime1, and an month offset# return the result datetimedef datetime_offset_by_month(datetime1, n = 1):    # create a shortcut object for one day    one_day = datetime.timedelta(days = 1)    # first use div and mod to determine year cycle    q,r = divmod(datetime1.month + n, 12)    # create a datetime2    # to be the last day of the target month    datetime2 = datetime.datetime(        datetime1.year + q, r + 1, 1) - one_day'''   if input date is the last day of this month   then the output date should also be the last   day of the target month, although the day   www.iplaypy.com   may be different.   for example:   datetime1 = 8.31   datetime2 = 9.30'''    if datetime1.month != (datetime1 + one_day).month:        return datetime2'''    if datetime1 day is bigger than last day of    target month, then, use datetime2    for example:    datetime1 = 10.31    datetime2 = 11.30'''    if datetime1.day >= datetime2.day:        return datetime2''' then, here, we just replace datetime2's day with the same of datetime1, that's ok.'''    return datetime2.replace(day = datetime1.day)#------------编橙之家-----www.iplaypy.com---------------d1 = datetime.datetime(2008, 8, 17)d2 = datetime_offset_by_month(d1, 13)print '2008-8-17 + 13 month'print d2printd1 = datetime.datetime(2008, 8, 31)d2 = datetime_offset_by_month(d1, 13)print '2008-8-31 + 13 month'print d2printd1 = datetime.datetime(2007, 1, 30)d2 = datetime_offset_by_month(d1, 13)print '2007-1-30 + 13 month'print d2printresult = """2008-8-17 + 13 month2009-09-17 00:00:002008-8-31 + 13 month2009-09-30 00:00:002007-1-30 + 13 month2008-02-29 00:00:00"""

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