logging.Formatter 日期格式

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修改于 2022-09-03 19:08:05

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修改于 2022-09-03 19:08:05

文章被收录于专栏：计算机视觉理论及其实现计算机视觉理论及其实现

formatter = logging.Formatter("%(asctime)s %(levelname)s %(message)s","%Y%b%d-%H:%M:%S")

上面的%Y等是时间格式，所以要想理解上面要表示个什么，先来看一下Python的时间格式。

%a - abbreviated weekday name
%A - full weekday name
%b - abbreviated month name
%B - full month name
%c - preferred date and time representation
%C - century number (the year pided by 100, range 00 to 99)
%d - day of the month (01 to 31)
%D - same as %m/%d/%y
%e - day of the month (1 to 31)
%g - like %G, but without the century
%G - 4-digit year corresponding to the ISO week number (see %V).
%h - same as %b
%H - hour, using a 24-hour clock (00 to 23)
%I - hour, using a 12-hour clock (01 to 12)
%j - day of the year (001 to 366)
%m - month (01 to 12)
%M - minute
%n - newline character
%p - either am or pm according to the given time value
%r - time in a.m. and p.m. notation
%R - time in 24 hour notation
%S - second
%t - tab character
%T - current time, equal to %H:%M:%S
%u - weekday as a number (1 to 7), Monday=1. Warning: In Sun Solaris Sunday=1
%U - week number of the current year, starting with the first Sunday as the first day of the first week
%V - The ISO 8601 week number of the current year (01 to 53), where week 1 is the first week that has at least 4 days in the current year, and with Monday as the first day of the week
%W - week number of the current year, starting with the first Monday as the first day of the first week
%w - day of the week as a decimal, Sunday=0
%x - preferred date representation without the time
%X - preferred time representation without the date
%y - year without a century (range 00 to 99)
%Y - year including the century
%Z or %z - time zone or name or abbreviation
%% - a literal % character

我们的例子是以年月日-时:分:秒的形式显示日期的。除此之外，还要理解%(asctime)s等格式符所代表的意义，%(asctime)s表示这个位置上是字符串形式的当前时间；%(levelname)s，如果是logger.debug则它是DEBUG，如果是logger.error则它是ERROR；%(message)s，假如有logger.warning("HAHA")，则在%(message)s位置上是字符串HAHA。更详细的格式符如下：