time,datetime

import time
res=time.time()      #float 时间戳
print(res)
loc=time.localtime() #生成struct_time
print(loc)
res=time.strftime('%Y-%m-%d:%X',loc)    #t=struct_time
print(res)

ret=time.asctime(time.localtime())       #参数是struct_time
print(ret)
ret=time.ctime(time.time())        $参数是时间戳
print(ret)

1541404843.15
time.struct_time(tm_year=2018, tm_mon=11, tm_mday=5, tm_hour=16, tm_min=0, tm_sec=43, tm_wday=0, tm_yday=309, tm_isdst=0)
2018-11-05:16:00:43
Mon Nov 5 16:00:43 2018
Mon Nov 5 16:00:43 2018

Process finished with exit code 0

import datetime

ret=datetime.datetime.now()
print(ret)
res=datetime.datetime.fromtimestamp(time.time())
print(res)

2018-11-05 16:07:23.125000
2018-11-05 16:07:23.125000