A selector expression for extracting data from JSON.
Project description
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.
Project details
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