Sort json file by key, recursively.

sort-json.py

import json
import collections
import os


def sort_keys(x):
    if isinstance(x, list):
        return [sort_keys(i) for i in x]
    elif isinstance(x, dict):
        ks = sorted(x.keys())
        t = collections.OrderedDict()
        for k in ks:
            t[k] = sort_keys(x[k])
        return t
    else:
        return x


def f(x):
    with open(x, "r", encoding="utf8") as ff:
        filedata = ''.join(line for line in ff if not line.lstrip().startswith('//'))
        d = json.loads(filedata)
        d = sort_keys(d)
        with open(x.replace(".json", "2.json"), "w", encoding="utf8") as gg:
            json.dump(d, gg, indent=2)


def main():
    for i in os.listdir():
        if i.endswith("2.json"):
            continue
        if not i.endswith(".json"):
            continue
        f(i)

main()