time \ datetime module the number of seconds and date format conversion

import time，datetime

#转年月日
timeArray = time.localtime(1525132800)
res = time.strftime(’%Y-%m-%d’, timeArray)
print(res)

#转秒数
temp = datetime.datetime(2018, 5, 30)
temp = time.mktime(temp.timetuple())
print(int(temp))