Python的time模块

time模块下只有若干个方法，没有类，所以直接用time.方法即可

1.time() -- return current time in seconds since the Epoch as a float
　　print time.time() 返回日期的秒数 1492351508.72

2.clock() -- return CPU time since process start as a float
　　输出CPU时间
3.sleep() -- delay for a number of seconds given as a float

4.gmtime() -- convert seconds since Epoch to UTC tuple
5.localtime() -- convert seconds since Epoch to local time tuple
　　把时间戳转为time.time_struct格式的时间数组
　　print time.localtime(time.time())
　　time.struct_time(tm_year=2017, tm_mon=4, tm_mday=16, tm_hour=22, tm_min=14, tm_sec=57, tm_wday=6, tm_yday=106, tm_isdst=0)

6.asctime() -- convert time tuple to string
　　把时间数组转换为字符串
　　print time.asctime(time.localtime(time.time()))
　　Sun Apr 16 22:27:11 2017

7.ctime() -- convert time in seconds to string
　　把以秒表示的时间转为字符串
　　print time.ctime(time.time())
　　Sun Apr 16 22:27:57 2017

8.mktime() -- convert local time tuple to seconds since Epoch
　　把时间数组转为秒表示
　　print time.mktime(time.localtime(time.time()))
　　1492352997.0

9.strftime() -- convert time tuple to string according to format specification
10.strptime() -- parse string to time tuple according to format specification
11.tzset() -- change the local timezone