> For the complete documentation index, see [llms.txt](https://moluo.gitbook.io/notes/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://moluo.gitbook.io/notes/bian-cheng-xue-xi/python/python3-ji-chu/10.4json.md).

# 10.4JSON

## JSON

json是一种轻量级的数据交换格式

## json字符串→python数据结构

在python中，json字符串被转换成python特定的数据结构，如:

Json对象被转换为字典dist

```python
import json
json_str='{"name":"qiyue","age":18}'
student=json.loads(json_str)
print(type(student))
print(student)
```

> 提示：因为json对象已被转换为dist，故我们需要的就是对dist的操作，如获取属性操作
>
> ```
> print(student['age'])
> ```

json数组被转化为列表

```python
import json
json_str='[{"name":"qiyue","age":18},{"name":"qiyue","age":18}]'
students=json.loads(json_str)
print(type(student))
print(student)
```

把json字符串向python数据类型转换的过程，专业名词为反序列化

## python数据结构→json字符串

把python数据类型向json字符串转换的过程，专业名词为序列化

```python
import json
student=[
    {'name':'qiyue','age':18,'flag':False},
    {'name':'qiyue','age':18}
]
json_str =json.dumps(student)
print(type(json_str))
print(json_str)
```