Python之JSON函数介绍

{"car":{"price":1100,"color":"red"},"mac":{"price":7999,"color":"black"},"abc":{"price":122,"color":"green"}}

import json

with open('a.json') as fp:

    shop_dic = json.load(fp)  #从a.json文件内读取数据，返回结果为字典：{'abc': {'price': 122, 'color': 'green'},

     'mac': {'price': 7999, 'color': 'black'}, 'car': {'price': 1100, 'color': 'red'}}

    print(shop_dic)

s_json = '{"name":"niuniu","age":20,"status":true}'

print(json.loads(s_json))         #将json串转换为字典：{'age': 20, 'status': True, 'name': 'niuniu'}

import json

with open('a.json', 'a+') as fp:

    dic = {'name': 'niuniu', 'age': 18}

    fp.seek(0)

    fp.truncate()

    json.dump(dic, fp)    #将字典转换为json串写入文件

{"age": 18, "name": "niuniu"}

json.dumps()

import json

dic = {'name': 'niuniu', 'age': 18}

print(json.dumps(dic))           #将字典转换为json串：{"name": "niuniu", "age"

import json

d = {"Name": "战神","sex" : ["男","女","人妖"],"Education":{"GradeSchool" : "第一小学",

"MiddleSchool" : ["第一初中" , "第一高中"], "University" :{ "Name" : "哈佛大学", "Specialty" : ["一年级","二年级"]}}}

with open('a.json', 'w', encoding='utf-8') as f:

    # 中文显示乱码问题, ensure_ascii = False

    # json格式化问题, indent = 8

    # s = json.dumps(d, ensure_ascii=False, indent=8)  字典转换为json 字符串

    # f.write(s)

    #第二种写法

    json.dump(d, f, ensure_ascii=False,indent=8)