Analysis of usage examples of time module and datetime module in Python

Time module method:

time.time(): Get the timestamp of the current time

time.localtime(): Accept a timestamp , and convert it into a tuple of the current time. If no parameters are given, time.time() will be passed in as a parameter by default

##time.localtime ():IndexAttributeMeaning0tm_year 年1tm_mon月2tm_mday日3tm_hourhour 4tm_minminutes5tm_secseconds6tm_wdayDay of the week7tm_yday Day of the year8tm_isdstDaylight Saving Time

• time.mktime(): Contrary to time.localtime(), it converts a time tuple into a timestamp (this must be given a parameter)

• time.asctime(): Represents a time tuple in the format of "Sun Jul 28 03:35:26 2013". If no parameters are given, time.localtime() will be passed in as a parameter by default

• time.ctime(): Convert a timestamp to the expression format of time.asctime(). If no parameters are given, time.time() will be passed in as a parameter by default

• time.gmtime(): Convert a timestamp to a time tuple in UTC+0 time zone (China should be +8 time zone, a difference of 8 hours). If no parameters are given, it will default to time.time() is passed in as a parameter

• time.strftime(format, time.localtime()): Convert a time tuple into a formatted time character, without giving a time For tuple parameters, time.localtime() will be passed in as a parameter by default

For example, the time format in the web log is time.strftime('%d/%b/%Y :%X')

Return result:

Sun Jul 28 04:37:38 2013

format:

AttributeFormatMeaningValue range (format)Year%yThe year minus the century00-99 %YComplete year%jDay of the year001-366## Month%b##%BLocal complete month name Full English monthDate%dDay of the month1 month 31st%HThe hour (12-hour clock)%M%S%UThe number of weeks in the year (counting from Monday)Day of the week%Z%xlocal print TimeDetailed Date Time'%' characterCorresponding characters of local am or pm

%m	Month	January 12th
	Local simplified month name	Abbreviated English month
			##hour
The hour of the day (24-hour clock)	00-23		%l
	“01-12”		Minutes
Minutes	00-59		Seconds
Seconds	00-59		Week
The number of weeks in the year (from Starting from Sunday)	00-53		%W
			%w
	0-6		Time Zone
China: It should be GMT+8 (China Standard Time)	Please educate yourself		Others
Local corresponding date	日/month/year		%X
	Hour:Minute:Second		%c
	Day/Month/Year Hour:Minute:Second		%%
	'%' character		%p
	AM or PM		time.strptime(stringtime,format):将时间字符串根据指定的格式化符转换成数组形式的时间, 例如： time.strptime('28/Jul/2013:04:33:29', '%d/%b/%Y:%X') 返回结果： 复制代码 代码如下: time.struct_time(tm_year=2013, tm_mon=7, tm_mday=28, tm_hour=4, tm_min=33, tm_sec=29, tm_wday=6, tm_yday=209, tm_isdst=-1) time.clock():返回处理器时钟时间,一般用于性能测试和基准测试等，因为他们反映了程序使用的实际时间，平常用不到这个。 time.sleep():推迟指定的时间运行，单位为秒 import time print time.time() #打印时间戳 print time.localtime()#打印本地时间元组 print time.gmtime()#答应UTC+0时区的时间元组 print time.ctime()#打印asctime格式化时间 print time.mktime(time.localtime())#将时间元组转换为时间戳 print time.asctime()#打印格式化时间 print time.strftime('%d/%b/%Y:%X')#打印指定格式的时间格式 #把时间字符串和它的格式翻译成时间元组 print time.strptime('28/Jul/2013:04:33:29', '%d/%b/%Y:%X') print '%0.5f'%time.clock() #打印处理器时间 for i in range(100000): pass print '%0.5f'%time.clock()#打印处理器时间 来看一下结果： [root@localhost ~]# python time1.py 1364028568.55 time.struct_time(tm_year=2013, tm_mon=3, tm_mday=23, tm_hour=4, tm_min=49, tm_sec=28, tm_wday=5, tm_yday=82, tm_isdst=1) time.struct_time(tm_year=2013, tm_mon=3, tm_mday=23, tm_hour=8, tm_min=49, tm_sec=28, tm_wday=5, tm_yday=82, tm_isdst=0) Sat Mar 23 04:49:28 2013 1364028568.0 Sat Mar 23 04:49:28 2013 23/Mar/2013:04:49:28 time.struct_time(tm_year=2013, tm_mon=7, tm_mday=28, tm_hour=4, tm_min=33, tm_sec=29, tm_wday=6, tm_yday=209, tm_isdst=-1) 0.02000 0.03000 datetime模块 datetime.time():生成一个时间对象。这个时间可以由我们来设置，默认都是0(这个类只针对时间) #coding:utf-8 import datetime print datetime.time() t = datetime.time(1, 3, 5, 25) print t print t.hour #时 print t.minute #分 print t.second #秒 print t.microsecond #毫秒 print datetime.time.max #一天的结束时间 print datetime.time.min #一天的开始时间 执行一下： 00:00:00 01:03:05.000025 23:59:59.999999 00:00:00 datetime.date():生成一个日期对象。这个日期要由我们来设置，(这个类只针对日期) #coding:utf-8 import datetime #设置日期 t = datetime.date(2013, 2, 3) #打印设置日期的和元组 print t.timetuple()#日期元组 print t print t.year #年 print t.month #月 print t.day #日 #获取今天的日期 today = datetime.date.today() print today print datetime.datetime.now()#这个打印到毫秒级别 #获取今天日期的元组 t1 = today.timetuple() print t1 #打印成ctime格式(time.ctime()格式) #'%a %b %d %H:%M:%S %Y' print t.ctime() print today.ctime() 运行结果 time.struct_time(tm_year=2013, tm_mon=2, tm_mday=3, tm_hour=0, tm_min=0, tm_sec=0, tm_wday=6, tm_yday=34, tm_isdst=-1) 2013-02-03 2013 2 3 2013-07-28 2013-07-28 20:13:25.942000 time.struct_time(tm_year=2013, tm_mon=7, tm_mday=28, tm_hour=0, tm_min=0, tm_sec=0, tm_wday=6, tm_yday=209, tm_isdst=-1) Sun Feb 3 00:00:00 2013 Sun Jul 28 00:00:00 2013 datetime.timedelta():这个类用来做时间的算数运算 datetime.datetime.combine(date,time):这个用来结合日期和时间的 #coding:utf-8 import datetime #打印：从毫秒到周的表示格式 = 转换成秒 （total_seconds()） for i in [datetime.timedelta(milliseconds=1), #1毫秒 datetime.timedelta(seconds=1), #1秒 datetime.timedelta(minutes=1), #1分钟 datetime.timedelta(hours=1), #1小时 datetime.timedelta(days=1), #1天 datetime.timedelta(weeks=1)]:#11周 #print i + '：' + i.total_seconds() print '%s = %s seconds'%(i,i.total_seconds()) print print '~' * 20 + '我是分割线' + '~' * 20 print '计算时间的加减。。。。。。。。。' a = datetime.datetime.now() print '现在时间是：' print a print '加5小时之后变成：' b = a + datetime.timedelta(hours=5) print b print '加一周之后变成：' c = a + datetime.timedelta(weeks=1) print c print '减去一周后变成：' d = a - datetime.timedelta(weeks=1) print d print '计算2个时间相差多久' print '%s减去%s'%(b, a) print '等于:%s'%(b - a) print '%s减去%s'%(a, d) print '等于:%s'%(a - d) print print '~' * 20 + '我是分割线' + '~' * 20 print '比较2个时间：' print '比较当天和一周前的' print a > d print '如果比较d > a 的话就返回False' print print '~' * 20 + '我是分割线' + '~' * 20 print '上面的列子都是把日期和时间分开的，现在我们来把他们自由结合' print '假设我们想要的时间是：2014-01-05 13：14：25' t = datetime.time(13, 14, 25) d = datetime.date(2014, 01, 05) print datetime.datetime.combine(d, t) 打印为： 0:00:00.001000 = 0.001 seconds 0:00:01 = 1.0 seconds 0:01:00 = 60.0 seconds 1:00:00 = 3600.0 seconds 1 day, 0:00:00 = 86400.0 seconds 7 days, 0:00:00 = 604800.0 seconds 计算时间的加减。。。。。。。。。 现在时间是： 2013-07-28 21:34:33.531000 加5小时之后变成： 2013-07-29 02:34:33.531000 加一周之后变成： 2013-08-04 21:34:33.531000 减去一周后变成： 2013-07-21 21:34:33.531000 计算2个时间相差多久 2013-07-29 02:34:33.531000减去2013-07-28 21:34:33.531000 等于:5:00:00 2013-07-28 21:34:33.531000减去2013-07-21 21:34:33.531000 等于:7 days, 0:00:00 比较2个时间： 比较当天和一周前的 True 如果比较d > a 的话就返回False 上面的列子都是把日期和时间分开的，现在我们来把他们自由结合 假设我们想要的时间是：2014-01-05 13：14：25 2014-01-05 13:14:25 更多Python中time模块和datetime模块的用法示例分析相关文章请关注PHP中文网！