python 13位时间戳转转为日期格式提示错误~！

Question

python 2.7

def timeStamp(timeNum):
    timeStamp = float(timeNum)
    timeArray = time.localtime(timeStamp)
    otherStyleTime = time.strftime("%Y-%m-%d %H:%M:%S", timeArray)
    print otherStyleTime

调用函数timeStamp(1457410893000)的时候

提示错误：
ValueError: (22, 'Invalid argument')

求教，谢谢~！

Answer 1

timeNum/1000