discord.py 等级系统（添加角色）

Question

我想添加一个角色，它会给予每个达到 5 级的人。我已经尝试过一些东西，但没有奏效。有人知道如何开始吗？

统计数据保存在一个 .json 文件中，如下所示： {"719479402953572383": {"504641949068689430": {"experience": 8, "level": 1}}}

async def on_message(message):
    if not message.author.bot:
        print('function load')
        with open('level.json','r') as f:
            users = json.load(f)
            print('file load')
        await update_data(users, message.author,message.guild)
        await add_experience(users, message.author, 4, message.guild)
        await level_up(users, message.author,message.channel, message.guild)


        with open('level.json','w') as f:
            json.dump(users, f)
    await bot.process_commands(message)



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

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

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

  if str(user.guild.id) != '757383943116030074':
    if lvl_start < lvl_end:
      await channel.send('{} has leveled up to Level {}'.format(user.mention, lvl_end))
      users[str(user.guild.id)][str(user.id)]['level'] = lvl_end```