Check a JSON file against a Schema.

jsonlint.py

#!/usr/bin/env python

import argparse
import json
import jsonschema

parser = argparse.ArgumentParser(
    description='validate the json file against the json schema')
parser.add_argument(
    'datafile', type=argparse.FileType('r'),
    help='the file containing the json data to be validated')
parser.add_argument(
    '--schemafile', type=argparse.FileType('r'),
    help='the file containing the json schema to validate against')

args = parser.parse_args()

data = json.load(args.datafile)
print("{} is syntactically valid".format(args.datafile.name))

if args.schemafile is not None:
    schema = json.load(args.schemafile)
    print("{} is syntactically valid".format(args.schemafile.name))

    jsonschema.validate(data, schema)
    print("{} is semantically valid".format(args.datafile.name))