Read compressed json file and write indented json to another file.

indenter.py

import json
import time

FILE_NAME = "Preferences"

with open(FILE_NAME, "r") as rfp:
    data = json.load(rfp)

with open(FILE_NAME+"-indented.json", "w") as wfp:
    wfp.write(json.dumps(data, indent=4, sort_keys=True))