ميزات البرنامج · رفض أعضاء JSON المكررين

import json

def unique_members(pairs):
    result = {}
    for key, value in pairs:
        if key in result:
            raise ValueError("member.duplicate")
        result[key] = value
    return result

def reject_constant(value):
    raise ValueError("constant.invalid")

def parse_unique(text):
    return json.loads(text, object_pairs_hook=unique_members,
                      parse_constant=reject_constant)