Python 将毫秒转换成日期

今天写工程碰见一个问题，需要将毫秒转换成日期

#!-*- coding:UTF-8 -*-
'''
Created on 2015-4-14
'''
import datetime
import time

timeStamp = 1427349630000
timeStamp /= 1000.0
print timeStamp
timearr = time.localtime(timeStamp)
otherStyleTime = time.strftime("%Y-%m-%d %H:%M:%S", timearr)
print otherStyleTime