python對時間日期做格式化

Python格式化日期時間的函數為datetime.datetime.strftime()；由字串轉為日期型的函數為：datetime.datetime.strptime()，兩個函數都涉及日期時間的格式化字串，列舉如下：

%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 (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

舉一個例子：

ebay中時間格式為‘Sep-21-09 16:34’

則通過下面代碼將這個字串轉換成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轉換成字串

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