python时间戳转换

import time
str_time = '2013-10-10 23:40:00'
timestamp = int(time.mktime(time.strptime(str_time, '%Y-%m-%d %H:%M:%S')))  #转时间戳
data = time.strftime('%Y-%m-%d %H:%M:%S', time.localtime(int(timestamp)))   #转字符串