Python如何在存储在列表中的namedtuple中编辑数据？ [英] Python how to edit data in a namedtuple stored in a list?

问题描述

import struct
from collections import namedtuple

StructPageNum = namedtuple('FDResult', ['DeviceID', 'PageNum','PicSize','PicData'])
PageNumList = []

Node = StructPageNum(DeviceID='NR09', PageNum=[],PicSize=100,PicData='')
PageNumList.append(Node)

PageNumList[0].PicData = 'hello' //how to do at here?

问题

如何编辑值

QUESTION

how to edit the value of PicData?

推荐答案

在我看来，您可以使用 _replace 方法，可以很容易地做到这一点：

It looks to me like you can use the _replace method of a namedtuple to do this pretty easily:

PageNumList[0] = PageNumList[0]._replace(PicData='hello')

这会在您的 PageNumList 中放入一个新的namedtuple 看起来很像旧的namedtuple，只不过我们更改了 PicData 属性。您不能编辑已经存在的namedtuple，因为 namedtuple 是不可变的（就像它们的未命名对应项一样： tuples ）

This puts a new namedtuple in your PageNumList which looks pretty much like the old namedtuple except that we've changed the PicData "attribute". You can't edit the namedtuple that you have already since namedtuples are immutable (just like their unnamed counterparts: tuples)

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