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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)
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%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  Locales abbreviated weekday name.
    %A  Locales full weekday name.
    %b  Locales abbreviated month name.
    %B  Locales full month name.
    %c  Locales appropriate date and time representation.
    %I  Hour (12-hour clock) as a decimal number [01,12].
    %p  Locales equivalent of either AM or PM.
格式化占位符

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import time