python-json

#json是通用的数据类型，所有语言都认识
#key-value
#
s ='''
{
        "error_code": 0,
        "stu_info": [
                {
                        "id": 309,
                        "name": "小白",
                        "sex": "男",
                        "age": 28,
                        "addr": "河南省济源市北海大道32号",
                        "grade": "天蝎座",
                        "phone": "18512572946",
                        "gold": 100
                },
                {
                        "id": 310,
                        "name": "小白",
                        "sex": "男",
                        "age": 28,
                        "addr": "河南省济源市北海大道32号",
                        "grade": "天蝎座",
                        "phone": "18516572946",
                        "gold": 100
                }
        ]
}
'''
import json
res = json.loads(s)#json转换成字典
print(res)
print(res.keys())
print(type(res))

stus = {'张三':'123456','李四':'123456','wangwu':'123456'}
res2 = json.dumps(stus,indent=8,ensure_ascii=False)#字典转换成字符串
#indent=8,json格式
#ensure_ascii=False中文可以正常显示
print(res2)
print(type(res2))
with open('file.json','w',encoding='utf-8') as f3:
    f3.write(res2)

-----------------------------------------------------------------------------------------------------------

import json
# f = open('file.json',encoding='utf-8')
# content = f.read()
# user_dic = json.loads(content) #转换成字典
# print(user_dic)
#loads和load区别，loads传字符串，load传文件对象
# f = open('file.json',encoding='utf-8')
# user_dic = json.load(f) #转换成f字典
# print(user_dic)


stus = {'张三':'123456','李四':'123456','wangwu':'123456'}



with open('file.json','w',encoding='utf-8') as f3:
    res2 = json.dump(stus,f3, indent=4, ensure_ascii=False)  # 字典转换成字符串
    # indent=4,json格式
    # ensure_ascii=False中文可以正常显示

#如果要把字典写到文件里面的，dump比dumps要好用