time模块

import time

x=time.localtime(123213123) #取本地实际 元组
print(x)
# print(help(x))
print(x.tm_year)
print('this is 1973 day:%d' %x.tm_yday)
#print(time.mktime(x))#转换为时间戳格式秒
y=time.strftime("%Y-%m-%d %H:%M:%S" , x) #格式化字符串:1973-11-27 09:52:03
print(y)
print(time.strptime(y ,"%Y-%m-%d %H:%M:%S"))#转化为元组:time.struct_time(tm_year=1973, tm_mon=11, tm_mday=27, tm_hour=9, tm_min=52, tm_sec=3, tm_wday=1, tm_yday=331, tm_isdst=-1)

print(time.asctime())#time.ctime()格式一样 asctime接受元组， ctime接收的是时间戳

z=datetime.datetime.now() #当前时间2018-06-20 15:16:11.059816
print(z)

print(datetime.datetime.now()+datetime.timedelta(3))#三天后的时间
print(datetime.datetime.now()+datetime.timedelta(-3))#三天前的时间
print(datetime.datetime.now()+datetime.timedelta(hours=3))#三小时后的时间
print(datetime.datetime.now()+datetime.timedelta(hours=-3))#三小时前的时间