Python中的time模块与datetime模块用法总结
time模块 import time # time.struct_time(tm_year=2015,tm_mon=4,tm_mday=24,tm_hour=14,tm_min=17,tm_sec=26,tm_wday=4,tm_yday=114,tm_isdst=0) # 2015 print time.localtime() print time.localtime().tm_year 函数
import time # Fri Apr 24 06:39:34 2015 print time.asctime(time.gmtime()) # 0.0 # None # 1.01136392961 因计算机而异 print time.clock() print time.sleep(1) print time.clock() # Fri Apr 24 14:42:07 2015 print time.ctime() # 2015-04-24 print time.strftime('%Y-%m-%d',time.localtime()) # 1429857836.0 print time.mktime(time.localtime()) time模块中常用的格式化字符串
datetime模块 datetime.MINYEAR 和 datetime.MAXYEAR 模块常量表示datetime接受的范围
from datetime import timedelta,datetime a = datetime.now() b = timedelta(days=7) # 7 days,0:00:00 # 2015-04-14 16:02:39.189000 print b print a - b 下面说具体说一下类和类的方法 date类 一个date对象代表理想化的日期. class datetime.date(year,day) # All arguments are required. Arguments may be ints or longs. # 所有参数都是必须的. 参数可能是 int 或 long. MINYEAR <= year <= MAXYEAR 1<= month <= 12 1<= day <= number of days in the given month and year.(随着月份和年份) 如果参数脱离给的范围会抛出,valueError. 1.类方法 >`date.today()`:返回当前的本地日期,这等价于 `date.fromtimestamp(time.time())`. from datetime import date # print 2015-04-21 print date.today() 2.date.fromtimestamp(timestamp):根据提供的时间戳返回local date. 时间戳常用于对时间类型的存储. import time from datetime import date # 1429587111.21 # 2015-04-21 print time.time() print date.fromtimestamp(time.time()) 3.类方法date.fromordinal(ordinal):根据提供的Gregorian日历返回date.(不做描述) 类属性
d = date(2014,4,21) # 2014 4 21 print d.year,d.month,d.day 实例方法
d = date(2015,21) # 2015-04-21 # 2015-04-21 # 2015-04-22 print d print d.replace() print d.replace(day=22) # time.struct_time(tm_year=2015,tm_mday=21,tm_hour=0,tm_min=0,tm_sec=0,tm_wday=1,tm_yday=111,tm_isdst=-1) print d.timetuple() # print 1 # print 2 print d.weekday() print d.isoweekday() # print 2015-04-21 print d.isoformat() # print 21/04/2015 print d.strftime('%d/%m/%y') datetime 类 datetime 对象是一个单一的对象,包含所有date和time对象的信息. class datetime.datetime(year,day[,hour [,minute [,second [,microsecond [,tzinfo]]]]]) # The year,month and day arguments are required. MINYEAR <= year <= MAXYEAR 1 <= month <= 12 1 <= day <= n 0 <= hour < 24 0 <= minute < 60 0 <= second < 60 0 <= microsecond < 10**6 类方法
from datetime import datetime # 2015-04-21 14:07:39.262000 print datetime.today() # 2015-04-21 14:08:20.362000 print datetime.now() # 1429596607.06 # 2015-04-21 14:10:07.061000 t = time.time() print t print datetime.fromtimestamp(t) from datetime import datetime,date,time a = date(2015,21) b = time(14,13,34) # 2015-04-21 14:13:34 print datetime.combine(a,b) 实例方法
其他方法可查看官方文档… from datetime import datetime,time td = date(2015,21) n = time(14,28,30) # 2099-04-21 14:30:42.103000 print datetime.now(0.replace(year=2099) 类属性
实例属性(read-only)
time类 time 代表本地(一天内)时间. class datetime.time([hour [,minute [,second [,microsecond [,tzinfo]]]]]) # All arguments are optional. # 所有参数都是可选的. 0 <= hour < 24 0 <= minute < 60 0 <= second < 60 0 <= microsesond < 10**6 time类就是对时间的一些操作,其功能类似与datetime.其实date和time就是对datetime中日期和时间的操作. (编辑:李大同) 【声明】本站内容均来自网络,其相关言论仅代表作者个人观点,不代表本站立场。若无意侵犯到您的权利,请及时与联系站长删除相关内容! |