爬虫17-json用法

1.dump

import json
persons=[
    {
        'username':"wangchenyang",
        'age':14,
        'country':"china"
    },
    {
        'username':"王晨阳",
        'age':14,
        'country':"china"
    }
]
# json_str=json.dumps(persons)
# print(json_str)
with open('person.json','w',encoding="utf-8") as fp:
    json.dump(persons,fp,ensure_ascii=False)

　　

2.load

import json

# json_str='[{"username": "wangchenyang", "age": 14, "country": "china"}, {"username": "王晨阳", "age": 14, "country": "china"}]'

# persons=json.loads(json_str)
# for person in persons:
#     print(person)

with open('person.json','r',encoding="utf-8") as fp:
    persons = json.load(fp)
    for person in persons:
        print(person)