python3 时间戳和时间的一些转化

import datetime
now = datetime.datetime.now()#datatime类型
time_stamp = time.mktime(now.timetuple())
print(int(time_stamp))#秒级

st = time.strptime(‘2018-10-07 16:12:54‘, ‘%Y-%m-%d %H:%M:%S‘)
time_stamp = time.mktime(st) 
print(int(time_stamp))#秒级

import time
time_stamp = int(time.time())
print(time_stamp)#int

ltime = time.localtime(1552723974)
time_stamp  = time.strftime(‘%Y-%m-%d %H:%M:%S‘,ltime)
print(time_stamp)#str