Python 时间格式化（转）

From：http://www.cnblogs.com/65702708/archive/2011/04/17/2018936.html

http://www.wklken.me/posts/2015/03/03/python-base-datetime.html

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，列举如下：

 %a Abbreviated weekday name
 %A Full weekday name
 %b Abbreviated month name
 %B Full month name
 %c Date and time representation appropriate for locale
 %d Day of month as decimal number ( - )
 %H Hour in -hour format ( - )
 %I Hour in -hour format ( - )
 %j Day of year as decimal number ( - )
 %m Month as decimal number ( - )
 %M Minute as decimal number ( - )
 %p Current locale's A.M./P.M. indicator for 12-hour clock
 %S Second as decimal number ( - )
 %U Week of year as decimal number, with Sunday as first day of week ( - )
 %w Weekday as decimal number ( - ; Sunday is )
 %W Week of year as decimal number, with Monday as first day of week ( - )
 %x Date representation for current locale
 %X Time representation for current locale
 %y Year without century, as decimal number ( - )
 %Y Year with century, as decimal number
 %z, %Z Time-zone name or abbreviation; no characters if time zone is unknown
 %% Percent sign

举一个例子：

ebay中时间格式为‘Sep-21-09 16:34’

则通过下面代码将这个字符串转换成datetime

c = datetime.datetime.strptime('Sep-21-09 16:34','%b-%d-%y %H:%M');

#打印C
c
datetime.datetime(2009, 9, 21, 16, 34)

又如：datetime转换成字符串

datetime.datetime.now().strftime('%b-%d-%y %H:%M:%S');
'Sep-22-09 16:48:08'