Error when rewriting json via python?

Question

Python

I wrote a BASH script, I needed a base, I decided to make it on json, overwrite it using python, and then parse it using JQ, I hadn’t done a base on json before, as a result, after a lot of trial and error, everything finally worked, then I added the keys (also for the first time) and everything stopped working

#!/usr/bin/env python

import argparse 
import json

parser = argparse.ArgumentParser(description="test")
parser.add_argument("-i", dest="id", required=True)
parser.add_argument("-a", dest="api", required=True)
args = parser.parse_args()

def a(id, api):
    with open("tg.json", "rt", encoding="utf-8") as file:
        settings = json.load(file)
 
    settings["id"] = {id}
    settings["api"] = {api}

    with open("tg.json", "wt", encoding="utf-8") as file:
        json.dump(settings, file, indent=4)
print ({id})
rc, message = a(args.id, args.api)

The error lies in the fact that everything in the json file hung at the moment the "block" id was written, the rest of the database simply disappeared.

PS: the code is not mine at all, everything is copied from the Internet (do not scold)