Python的jsonpath库使用方法实例

pip install jsonpath

import jsonpath
data = { "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
    }
  }
}
# 获取所有book的价格
price = jsonpath.jsonpath(data, '$.store.book[*].price')
print(price)
>> [8.95, 12.99, 8.99, 22.99]
# 获取部分book节点下的price节点值，可支持切片操作
res1 = jsonpath.jsonpath(data, '$.store.book[0,1].price')
res2 = jsonpath.jsonpath(data, '$.store.book[0:2].price')
print(res1)
print(res2)
>> [8.95, 12.99]
>> [8.95, 12.99]
# 获取最后一本书的价格（不能通过[-1]这种方式获取）
res3 = jsonpath.jsonpath(data, '$.store.book[-1:].price')
print(res3)
>> [22.99]
# 获取store节点下所有price节点的值
res4 = jsonpath.jsonpath(data, '$.store...price')
res5 = jsonpath.jsonpath(data, '$..price')
print(res4)
print(res5)
>> [8.95, 12.99, 8.99, 22.99, 19.95]
>> [8.95, 12.99, 8.99, 22.99, 19.95]
# jsonpath解析错误，返回bool类型数据false
res6 = jsonpath.jsonpath(data, '$.store.book111')
print(res6)
>> False
# 获取价格大于10的所有书籍信息
book = jsonpath.jsonpath(data, '$..book[?(@.price>10)]')
print(book)
>> [{'category': 'fiction', 'author': 'Evelyn Waugh', 'title': 'Sword of Honour', 'price': 12.99}, {'category': 'fiction', 'author': 'J. R. R. Tolkien', 'title': 'The Lord of the Rings', 'isbn': '0-395-19395-8', 'price': 22.99}]
# 获取book的价格大于10的prcice
price = jsonpath.jsonpath(data, '$..book[?(@.price>10)].price')
print(price)
>> [12.99, 22.99]
# 过滤所有带有 isbn编号的书籍信息
isbn = jsonpath.jsonpath(data, '$..book[?(@.isbn)]')
print(isbn)
>> [{'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}]