Python json解析库jsonpath原理及使用示例

脚本专栏 2024/11/8 佚名

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jsonpath

jsonpath 用于多层嵌套 json格式的解析。

pip install jsonpath

JsonPath 描述 $ 根节点 @ 现行节点 .or[] 取子节点 n/a 取父节点，jsonpath为支持 .. 就是不管位置，选择所有复合条件的条件 * 匹配所有元素节点 n/a 根据属性访问，json不支持，因为json是个key-value递归结构，不需要数属性访问 [] 迭代器标示(可以在里边做简单的迭代操作，如数组下标，根据内容选值等) [,] 支持迭代器中做多选 "htmlcode">

book_dict = { 
 "store": {
  "book": [ 
   { "category": "reference",
    "author": "Nigel Rees",
    "title": "Sayings of the Century",
    "price": 8.95
   },
   { "category": "fiction",
    "author": "Evelyn Waugh",
    "title": "Sword of Honour",
    "price": 12.99
   },
   { "category": "fiction",
    "author": "Herman Melville",
    "title": "Moby Dick",
    "isbn": "0-553-21311-3",
    "price": 8.99
   },
   { "category": "fiction",
    "author": "J. R. R. Tolkien",
    "title": "The Lord of the Rings",
    "isbn": "0-395-19395-8",
    "price": 22.99
   }
  ],
  "bicycle": {
   "color": "red",
   "price": 19.95
  }
 }
}

JsonPath Result $.store.book[*].author store中的所有的book作者 $…author 所有的作者 $.store.* store下的所有元素 $.store…price store中的所有价钱 $…book[2] 第三本书 $…book[(@.length-1)] 最后一本书 $…book[0,1] 取前两本书 $…book["htmlcode">

import jsonpath

result = {
  "code": 0,
  "data": [
    {
      "age": 20,
      "create_time": "2019-09-15",
      "id": 1,
      "mail": "283340479@qq.com",
      "name": "yoyo",
      "sex": "M"
    },
    {
      "age": 21,
      "create_time": "2019-09-16",
      "id": 2,
      "mail": "123445@qq.com",
      "name": "yoyo111",
      "sex": "M"
    }
  ],
  "msg": "success!"
}

msg = jsonpath.jsonpath(result, '$.msg')
print(msg)  # 输出结果 ['success!']
names = jsonpath.jsonpath(result, '$..name')
print(names)  # 输出结果 ['yoyo', 'yoyo111']
no = jsonpath.jsonpath(result, '$..yoyo')
print(no)  # 找不到是结果是 False

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Python,json,解析库,jsonpath