json

Posted 2020-11-25 yzg-14

import json

lt = [
    {‘name‘: ‘王宝强‘, ‘age‘: 30},
    {‘name‘: ‘贾乃亮‘, ‘age‘: 36},
    {‘name‘: ‘马蓉蓉‘, ‘age‘: 33},
    {‘name‘: ‘宋吉吉‘, ‘age‘: 40},
    {‘name‘: ‘李小璐‘, ‘age‘: 43},
]
# json字符串<------dumps------python数据类型
#          ------loads------->
# 包含json的类文件对象<------dump------python数据类型
#                   ------load------->
# 具有read()或者write()方法的对象就是类文件对象
    # f = open(“a.txt”,”r”) f就是类文件对象
string = json.dumps(lt)
print(type(string))  # <class ‘str‘>  # json字符串
print(string)  # [{"name": "u738bu5b9du5f3a", "age": 30}, {"name": "u8d3eu4e43u4eae", "age": 36}, {"name": "u9a6cu84c9u84c9", "age": 33}, {"name": "u5b8bu5409u5409", "age": 40}, {"name": "u674eu5c0fu7490", "age": 43}]
obj = json.loads(string)

print(type(obj))  # <class ‘list‘>

json.dump(lt, open(‘json.txt‘, ‘w‘, encoding=‘utf8‘))
obj = json.load(open(‘json.txt‘, ‘r‘, encoding=‘utf8‘))
print(type(obj))  # <class ‘list‘>
print(obj)  # [{‘name‘: ‘王宝强‘, ‘age‘: 30}, {‘name‘: ‘贾乃亮‘, ‘age‘: 36}, {‘name‘: ‘马蓉蓉‘, ‘age‘: 33}, {‘name‘: ‘宋吉吉‘, ‘age‘: 40}, {‘name‘: ‘李小璐‘, ‘age‘: 43}]