使用Python处理json文件时，经常会遇到一些编码的问题。本次分享一下，python加载json文件，编码以及序列化。

1.需求：给定一个字符串，对字符串遍历，每隔16个字符插入一个换行符，具体实现代码如下：

import json
import re
import sys
import os
s="愿你合上笔盖的刹那，有着侠客收剑入鞘的骄傲"
s=re.sub(r"(.{16})","\\1\n",s)
print(s)

2.加载json文件并将其序列化为对象,并更改对象的question属性，重新写入新的json对象

import json
import re
import sys
import os

file=open("temp.json","r",encoding='utf-8')
info=json.load(file)
listArray=info["listArray"]
it=iter(listArray)
for x in it:
    s=x["question"]
    s=re.sub(r"(.{16})","\\1\n",s)
    x["question"]=s
tempArray=listArray
fp=open("answer.json",'w+',encoding='utf-8')
fp.write(json.dumps(tempArray,ensure_ascii=False))

3.temp.json 文件如下：

{
        "listArray":[
        {
            "ID": 1,
            "question": "请问“匈奴不灭，何以为家”表达了哪位将军的爱国情怀？",
            "A": "卫青",
            "B": "霍去病",
            "C": "李广",
            "correct": "B"
        },
        {
            "ID": 2,
            "question": "请问诗句“朔方烽火照甘泉，长安飞将出祁连。”中的“飞将”指的是？",
            "A": "卫青",
            "B": "李广",
            "C": "马援",
            "correct": "B"
        },
        {
            "ID": 3,
            "question": "请问诗句“出身仕汉羽林郎，初随骠骑战渔阳。”中的“骠骑”是指？",
            "A": "霍去病",
            "B": "卫青",
            "C": "李广",
            "correct": "A"
        },
        {
            "ID": 4,
            "question": "请问诗句“伏波惟愿裹尸还”中“伏波”是指？",
            "A": "傅介子",
            "B": "马援",
            "C": "班超",
            "correct": "B"
        }
    ]
}

4.输出的json文件如下所示：

[
    {
        "ID": 1,
        "question": "请问“匈奴不灭，何以为家”表达了\n哪位将军的爱国情怀？",
        "A": "卫青",
        "B": "霍去病",
        "C": "李广",
        "correct": "B"
    },
    {
        "ID": 2,
        "question": "请问诗句“朔方烽火照甘泉，长安飞\n将出祁连。”中的“飞将”指的是？\n",
        "A": "卫青",
        "B": "李广",
        "C": "马援",
        "correct": "B"
    },
    {
        "ID": 3,
        "question": "请问诗句“出身仕汉羽林郎，初随骠\n骑战渔阳。”中的“骠骑”是指？",
        "A": "霍去病",
        "B": "卫青",
        "C": "李广",
        "correct": "A"
    },
    {
        "ID": 4,
        "question": "请问诗句“伏波惟愿裹尸还”中“伏\n波”是指？",
        "A": "傅介子",
        "B": "马援",
        "C": "班超",
        "correct": "B"
    }
]

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