python对时间日期做格式化

>>> import datetime
>>> dir(datetime)
['MAXYEAR', 'MINYEAR', '__doc__', '__file__', '__name__', '__package__', 'date', 'datetime', 'datetime_CAPI', 'time', 'timedelta', 'tzinfo']
>>> datetime.datetime.now()
datetime.datetime(2015, 5, 11, 17, 29, 14, 476759)

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 appropriatefor locale
%d	Day of month as decimal number (01 - 31)
%H	Hour in 24-hour format (00 - 23)
%I	Hour in 12-hour format (01 - 12)
%j	Day of year as decimal number (001 - 366)
%m	Month as decimal number (01 - 12)
%M	Minute as decimal number (00 - 59)
%p	Current locale‘s A.M./P.M. indicator for 12-hour clock
%S	Second as decimal number (00 - 59)
%U	Week of year as decimal number,with Sunday as first day of week (00 - 51)
%w	Weekday as decimal number (0 - 6;Sunday is 0)
%W	Week of year as decimal number,with Monday as first day of week (00 - 51)
%x	Date representation for current locale
%X	Time representation for current locale
%y	Year without century, as decimal number (00 - 99)
%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');
>>> 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')
'May-11-15 17:29:29'