Strange operation of json storage, what to do?

Question

Python

import discord
import json
import os
from discord.ext import commands

client = commands.Bot(command_prefix='$')
os.chdir(r'C:\Sublime Text 3')

@client.event
async def on_ready():
    print('lvl ready')

@client.event
async def on_message(message):

    if message.content == 'system lvl':
        channel = message.channel
        await channel.send(channel, '{} level up {}'.format(user.mention, lvl_end))
        users[user.id]['level'] = lvl_end

    with open('users.json', 'r') as f:
        users = json.load(f)

        await update_data(users, message.author)
        await add_experience(users, message.author, 5)
        await level_up(users, message.author, message.channel)

    with open('users.json','w') as f:
        json.dump(users, f)

@client.event
async def on_member_join(member):
    with open('users.json', 'r') as f:
        users = json.load(f)

    await update_data(users, member)

    with open('users.json','w') as f:
        json.dump(users, f)

async def update_data(users, user):
    if not user.id in users:
        users[user.id] = {}
        users[user.id]['experience'] = 0
        users[user.id]['level'] = 1

async def add_experience(users, user, exp):
    users[user.id]['experience'] += exp

async def level_up(users, user, channel):
    experience = users[user.id]['experience']
    lvl_start = users[user.id]['level']
    lvl_end = int(experience ** (1/4))


    if lvl_start < lvl_end:
        await channel.send(channel, '{} level up {}'.format(user.mention, lvl_end))
        users[user.id]['level'] = lvl_end

when writing a message, everything works, if I wrote two, the json file outputs this:
{"293396418834464768": {"experience": 5, "level": 1}, "293396418834464768": {"experience": 5, "level": 1 }}

Why is this happening? According to the idea, it should add exp, but somehow it works very strangely.

Answer 1

user.id is a number initially? The number is not a valid key when json.dump()
Initially, in the code, the dictionary looks like this:
{293396418834464768: {"experience": 5, "level": 1}}
After the dump, it will be written to the file as
{"293396418834464768": {" experience": 5, "level": 1}}
Accordingly, if you read such a file and drop it into

async def update_data(users, user):
    if not user.id in users:
        users[user.id] = {}
        users[user.id]['experience'] = 0
        users[user.id]['level'] = 1

Then it will create a new object (because after reading the key changes to the string "293396418834464768", and the numeric 293396418834464768 is checked)
It can be clearly seen here:

import json


data = {1: 'value'}


with open('test', 'w') as f:
    json.dump(data, f)

print(data)


with open('test', 'r') as f:
    data = json.load(f)

print(data)

Conclusion:

{1: 'value'}
{'1': 'value'}

ps: I did not read the code completely, maybe there is an error in another, I wrote it in a quick way

Answer 2

json.dumps({'321': '1', 321: '1'})But whether the author will master it, the question is.