如何使用 discord.py 创建排名命令？

Question

最近我一直在尝试使用 discord.py（不使用 Cog，使用 bot.command）创建一个调平机器人。该代码实际上可以在每条消息之后更新级别，但 rank 命令不起作用。 我有一个类似json.decoder.JSONDecodeError: Expecting value: line 1 column 1 (char 0)的消息错误

请问有人有办法解决吗？

这是我的完整代码（json 和 discord 库已经导入）：

with open("users.json", "ab+") as ab:
    ab.close()
    f = open('users.json','r+')
    f.readline()
    if os.stat("users.json").st_size == 0:
      f.write("{}")
      f.close()
    else:
      pass
 
with open('users.json', 'r') as f:
  users = json.load(f)
 
@bot.event    
async def on_message(message):
    if message.author.bot == False:
        with open('users.json', 'r') as f:
            users = json.load(f)
        await add_experience(users, message.author)
        await level_up(users, message.author, message)
        with open('users.json', 'w') as f:
            json.dump(users, f)
            await bot.process_commands(message)
 
async def add_experience(users, user):
  if not f'{user.id}' in users:
        users[f'{user.id}'] = {}
        users[f'{user.id}']['experience'] = 0
        users[f'{user.id}']['level'] = 0
  users[f'{user.id}']['experience'] += 6
  print(f"{users[f'{user.id}']['level']}")
 
async def level_up(users, user, message):
  experience = users[f'{user.id}']["experience"]
  lvl_start = users[f'{user.id}']["level"]
  lvl_end = int(experience ** (1 / 4))
  if lvl_start < lvl_end:
    await message.channel.send(f':tada: {user.mention} has reached level {lvl_end}. Congrats! :tada:')
    users[f'{user.id}']["level"] = lvl_end
 
@bot.command()
async def level(ctx, member: discord.Member = None):
    if not member:
        id = ctx.message.author.id
        with open('users.json', 'r') as f:
            users = json.load(f)
        lvl = users[str(id)]['level']
        await ctx.send(f'You are at level {lvl}!')
    else:
        id = member.id
        with open('users.json', 'r') as f:
            users = json.load(f)
        lvl = users[str(id)]['level']
        await ctx.send(f'{member} is at level {lvl}!')

Answer 1

json 错误意味着你的 json 文件完全为空，你的 json 文件中至少需要{}。

Answer 2

在名为 users.json 的文件中 它必须看起来像这样：

{
  
}