python使用 JSONPath 解析 JSON 完整内容详解

JsonPath是一种简单的方法来提取给定JSON文档的部分内容。 JsonPath有许多编程语言，如Javascript，Python和PHP，Java。

JsonPath提供的json解析非常强大，它提供了类似正则表达式的语法，基本上可以满足所有你想要获得的json内容.

JsonPath表达式总是以与XPath表达式结合使用XML文档相同的方式引用JSON结构。
JsonPath中的“根成员对象”始终称为.store.book [0].title
或括号表示法
$['store']['book'][0]['title']

json操作实例
{
"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
}
},
"expensive": 10
}

代码实例
import jsonpath
'''
学习地址：http://www.ibloger.net/article/2329.html
'''

def learn_jsonpath():
book_store = {
"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
}
},
"expensive": 10

 }

# print(type(book_store))

# 查询store下的所有元素
print(jsonpath.jsonpath(book_store, '$.store.*'))

# 获取json中store下book下的所有author值
print(jsonpath.jsonpath(book_store, '$.store.book[*].author'))

# 获取所有json中所有author的值
print(jsonpath.jsonpath(book_store, '$..author'))

# 获取json中store下所有price的值
print(jsonpath.jsonpath(book_store, '$.store..price'))

# 获取json中book数组的第3个值
print(jsonpath.jsonpath(book_store, '$.store.book[2]'))

# 获取所有书
print(jsonpath.jsonpath(book_store, '$..book[0:1]'))

# 获取json中book数组中包含isbn的所有值
print(jsonpath.jsonpath(book_store, '$..book[?(@.isbn)]'))

# 获取json中book数组中price<10的所有值
print(jsonpath.jsonpath(book_store, '$..book[?(@.price<10)]'))