python中日期和时间格式化输出的方法小结
本文实例总结了python中日期和时间格式化输出的方法。分享给大家供大家参考。具体分析如下：
python格式化日期时间的函数为datetime.datetime.strftime()；由字符串转为日期型的函数为：datetime.datetime.strptime()，两个函数都涉及日期时间的格式化字符串，这里提供详细的代码详细演示了每一个参数的使用方法及范例。
下面是格式化日期和时间时可用的替换符号 %a 输出当前是星期几的英文简写
>>> import datetime
>>> now=datetime.datetime.now()
>>> now.strftime('%a')
'Sun'%A 输出完整的星期几名称英文
>>> import datetime
>>> now=datetime.datetime.now()
>>> now.strftime('%A')
'Sunday'%b 输出月份的英文简写
>>> import datetime
>>> now=datetime.datetime.now()
>>> now.strftime('%b')
'Sep'%B 输出月份的英文完整名称
>>> import datetime
>>> now=datetime.datetime.now()
>>> now.strftime('%B')
'September'%c 以本地时间显示日期和时间
>>> import datetime
>>> now=datetime.datetime.now()
>>> now.strftime('%c')
'09/15/13 21:43:29'%d 显示1-31之间的数，每月的第几天，也就是年月日中的日
>>> import datetime
>>> now=datetime.datetime.now()
>>> now.strftime('%d')
'15'%H 以24小时制显示小时，比如，02,14
>>> import datetime
>>> now=datetime.datetime.now()
>>> now.strftime('%H')
'21'%I 以12小时制的方式显示当前小时，例如当前jb51.net服务器的时间为晚上21点，使用%I显示09
>>> import datetime
>>> now=datetime.datetime.now()
>>> now.strftime('%I')
'09'%j 显示当前日期为一年中的第几天，如当前jb51.net服务器时间为2013年9月15日，则显示为258，也就是一年中的第258天
>>> import datetime
>>> now=datetime.datetime.now()
>>> now.strftime('%j')
'258'%m 显示1-12之间的月份
>>> import datetime
>>> now=datetime.datetime.now()
>>> now.strftime('%m')
'09'%M 显示00-59之间的分钟数
>>> import datetime
>>> now=datetime.datetime.now()
>>> now.strftime('%M')
'43'%p 以 A.M./P.M.方式显示是上午还是下午
>>> import datetime
>>> now=datetime.datetime.now()
>>> now.strftime('%p')
'PM'%S 显示0-59之间的秒数
>>> import datetime
>>> now=datetime.datetime.now()
>>> now.strftime('%S')
'29'%U 显示一年中的第几周，星期天为一周的第一天，例如当前www.jb51.net服务器时间为2013年9月15日，星期天，显示为第37周
>>> import datetime
>>> now=datetime.datetime.now()
>>> now.strftime('%U')
'37'%w 显示一周中的第几天，其中星期天为0，星期一为1，例如：jb51.net当前日期为2013年9月17日星期二，则显示结果为2
>>> import datetime
>>> now=datetime.datetime.now()
>>> now.strftime('%w')
'2'%W 显示一年中的第几周，和U%把不同的是星期一为一周的第一天，例如当前www.jb51.net服务器时间为2013年9月17日，星期二，显示为第37周，范围在0-51之间
>>> import datetime
>>> now=datetime.datetime.now()
>>> now.strftime('%W')
'37'%x 显示当地的日期，例如jb51.net本地时间为：北京时间2013年9月17日
>>> import datetime
>>> now=datetime.datetime.now()
>>> now.strftime('%x')
'09/17/13'%X 显示当地的时间，例如jb51.net本地时间为：北京时间2013年9月17日 07:55:04
>>> import datetime
>>> now=datetime.datetime.now()
>>> now.strftime('%X')
'07:55:04'%y 显示(00 - 99) 之间的年份，例如：jb51.net服务器时间为：2013年9月17日，则显示结果为13
>>> import datetime
>>> now=datetime.datetime.now()
>>> now.strftime('%y')
'13'%Y 显示完整年份，例如：jb51.net服务器时间为：2013年9月17日，则显示结果为2013
>>> import datetime
>>> now=datetime.datetime.now()
>>> now.strftime('%Y')
'2013'%z, %Z 输出时区，如果不能显示，则显示为空字符 %% 用于显示%符号
>>> now.strftime('%%')
'%'在举一个完整的例子：
显示当前日期时间：格式为：年-月-日 时:分:秒
>>> datetime.datetime.now().strftime('%Y-%m-%d %H:%M:%S');
'2013-09-17 08:06:17'希望本文所述对大家的Python程序设计有所帮助。
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