python 时间转换

不管看多少遍都记不住的转换方式，记下来，方便查看

几种格式

struct_time
time.struct_time(tm_year=2017, tm_mon=6, tm_mday=2, tm_hour=14, tm_min=19, tm_sec=49, tm_wday=4, tm_yday=153, tm_isdst=0)

format string 
2017-06-02 14:20:26

时间戳，也是timestamp
1496384456.97

格式化串
Fri Jun  2 14:36:50 2017

各种格式之间的转换

time.localtime()是一个struct_time

struct_time -> format string 
time.strftime("%Y-%m-%d %H:%m:%S", time.localtime())

struct_time -> timestamp
time.mktime(time.localtime())

format string -> struct_time
time.strptime("2017-06-02 14:06:57", "%Y-%m-%d %X")

timestamp -> struct_time
time.localtime(1496385208)

struct_time -> 格式化串
time.asctime(time.localtime())

timestamp -> 格式化串
time.ctime(1496385208)