Python_jsonpath_多層級讀取key的value

jsonpath簡介

如果有一個多層嵌套的復雜字典，想要根據key批量提取value，還是比較繁瑣的。jsonPath模塊就能解決這個痛點，接下來我們來學習一下jsonpath模塊。

因為jsonpath是第三方模塊，想要使用需要安裝

pip install jsonpath

jsonpath使用方法

import jsonpath
res=jsonpath.jsonpath(dict_data,'jsonpath語法規則字符串')

根據給定jsonpath語法規則，在dict_data中若能找到對應的數據，則以list類型返回數據，若找不到則返回false。

jsonpath語法規則

jsonpath使用示例

book_dict = {
        "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
        }
}

from jsonpath import jsonpath

# 獲取price的所有值
print(jsonpath(book_dict, '$..price'))

# 獲取book下面所有元素
print(jsonpath(book_dict, "$.book.*"))

# 獲取book下面所有price的值
print(jsonpath(book_dict, "$.book[*].price"))
print(jsonpath(book_dict, "$.book..price"))

# 獲取第1本書所有信息
print(jsonpath(book_dict, "$.book[0]"))

# 獲取第2~3本書所有信息
print(jsonpath(book_dict, "$.book[1:3]"))

# 獲取最后一本書
print(jsonpath(book_dict, "$.book[(@.length-1)]"))

# 獲取包含了isbn的所有書
print(jsonpath(book_dict, "$.book[?(@.isbn)]"))

# 獲取書的價格小於10的書
print(jsonpath(book_dict, "$.book[?(@.price<10)]"))

執行結果