python unix时间戳与正常时间转

#! /usr/bin/env python
#coding:utf-8

import sys,os,re
import time

def timestamp_datatime(value):
    format = '%Y-%m-%d %H:%M'
    #format = '%Y-%m-%d %H:%M:%S'
    #value 为时间戳值,如:1460073600.0
    value = time.localtime(value)
    dt = time.strftime(format,value)
    return dt

def datetime_timestamp(dt):
    time.strptime(dt,'%Y-%m-%d %H:%M')
    s = time.mktime(time.strptime(dt,'%Y-%m-%d %H:%M'))
    return s

if __name__ == '__main__':
    d = datetime_timestamp('2016-04-08 08:00')
    print d
    s = timestamp_datatime(1460073600.0)
    print s