特征工程之时间处理

def order_timestamp(x):
    result=datetime.datetime.strptime(x, '%Y-%m-%d %H:%M:%S.0')
    return result

def action_timestamp(timeNum):
    timeStamp = float(timeNum//1000)
    timeArray = time.localtime(timeStamp)
    otherStyleTime = time.strftime("%Y-%m-%d %H:%M:%S", timeArray)
    result=datetime.datetime.strptime(otherStyleTime, '%Y-%m-%d %H:%M:%S')
    return result