import time
时间相关的操作，时间有三种表示方式：
- 时间戳 1970年1月1日之后的秒，即：time.time()
- 格式化的字符串 2014-11-11 11:11， 即：time.strftime('%Y-%m-%d')
- 结构化时间 元组包含了：年、日、星期等... time.struct_time 即：time.localtime()
1 print time.time() 2 print time.mktime(time.localtime()) 3 4 print time.gmtime() #可加时间戳参数 5 print time.localtime() #可加时间戳参数 6 print time.strptime('2014-11-11', '%Y-%m-%d') 7 8 print time.strftime('%Y-%m-%d') #默认当前时间 9 print time.strftime('%Y-%m-%d',time.localtime()) #默认当前时间 10 print time.asctime() 11 print time.asctime(time.localtime()) 12 print time.ctime(time.time()) 13 14 import datetime 15 ''' 16 datetime.date：表示日期的类。常用的属性有year, month, day 17 datetime.time：表示时间的类。常用的属性有hour, minute, second, microsecond 18 datetime.datetime：表示日期时间 19 datetime.timedelta：表示时间间隔，即两个时间点之间的长度 20 timedelta([days[, seconds[, microseconds[, milliseconds[, minutes[, hours[, weeks]]]]]]]) 21 strftime("%Y-%m-%d") 22 ''' 23 import datetime 24 print datetime.datetime.now() 25 print datetime.datetime.now() - datetime.timedelta(days=5)
%Y Year with century as a decimal number. %m Month as a decimal number [01,12]. %d Day of the month as a decimal number [01,31]. %H Hour (24-hour clock) as a decimal number [00,23]. %M Minute as a decimal number [00,59]. %S Second as a decimal number [00,61]. %z Time zone offset from UTC. %a Locale's abbreviated weekday name. %A Locale's full weekday name. %b Locale's abbreviated month name. %B Locale's full month name. %c Locale's appropriate date and time representation. %I Hour (12-hour clock) as a decimal number [01,12]. %p Locale's equivalent of either AM or PM.
