JSON auto-formatter

jsonformatter.py

import json
import sys
import argparse

parser = argparse.ArgumentParser(prog='jsonformatter')
parser.add_argument('input', type=str, help='Input file')
parser.add_argument('output', type=str, nargs='?', help='Output file')

args = parser.parse_args()

input_file = args.input
output_file = args.output or args.input

text = open(input_file, 'rb').read()
data = json.loads(text)
text = json.dumps(data, sort_keys=True, indent=4, separators=(',', ': '))
open(output_file, 'wb').write(text)