jsonpath-extractor 0.7.0

A selector expression for extracting data from JSON.

A selector expression for extracting data from JSON.

Quickstarts

Installation

Install the stable version from PYPI.

pip install jsonpath-extractor

Or install the latest version from Github.

pip install git+https://github.com/linw1995/jsonpath.git@master

Usage

{
    "goods": [
        {"price": 100, "category": "Comic book"},
        {"price": 200, "category": "magazine"},
        {"price": 200, "no category": ""}
    ],
    "targetCategory": "book"
}

How to parse and extract all the comic book data from the above JSON file.

import json

from jsonpath import parse

with open("example.json", "r") as f:
    data = json.load(f)

assert parse("$.goods[contains(@.category, $.targetCategory)]").find(
    data
) == [{"price": 100, "category": "Comic book"}]

Or use the jsonpath.core module to extract it.

from jsonpath.core import Root, Contains, Self

assert Root().Name("goods").Predicate(
    Contains(Self().Name("category"), Root().Name("targetCategory"))
).find(data) == [{"price": 100, "category": "Comic book"}]

Usage via CLI

The faster way to extract by using CLI.

jp -f example.json "$.goods[contains(@.category, $.targetCategory)]"

Or pass content by pipeline.

cat example.json | jp "$.goods[contains(@.category, $.targetCategory)]"

The output of the above commands.

[
  {
    "price": 100,
    "category": "Comic book"
  }
]

Changelog

v0.7.0

• 46cfd08 Fix,Dev:make init_by_poetry error when python(system) version is lower than 3.7

• 19f981f Chg:Upgrade lark-parser

• 982e344 New:Rewrite grammar to support more extensible jsonpath expression, e.g., more elegant comparison syntax.

• 1803339 New:Slice supports to cooperate with JSONPath.