bot for unwhitelisting people

Question

I'm trying to make a bot for whitelisting and unwhitelisting people. I've use replit because it has easy DB - code will run in their DB. So I started making bot whitelist, which was easy. When I started unwhitelisting there was an error ... when I was V.I.P bot it said that I wasn't. Please help me... code :

@client.command()
async def unwhitelist(ctx, user):
    role = ctx.guild.get_role(893143464781422612)
    if role in ctx.author.roles:
        try:
            if len(db[str(user)]) != -1:
                del db[str(user)]
                await ctx.send(f'Succesfult deleted {str(user)} from V.I.P')
        except:
            await ctx.send(f'{str(user)} is not V.I.P')
    else:
        await ctx.send('U dont have Permission')

DB looks like this:

{'user', 'user1', 'user2'}

DB is plugin of replit so... don't get confused

Answer 1

TLDR

Replace

try:
    if len(db[str(user)]) != -1:
        del db[str(user)]
        await ctx.send(f'Succesfult deleted {str(user)} from V.I.P')
except:
    await ctx.send(f'{str(user)} is not V.I.P')

with

if str(user) in db:
    db.remove(str(user))
    await ctx.send(f'Succesfult deleted {str(user)} from V.I.P')
else:
    await ctx.send(f'{str(user)} is not V.I.P')

Explanation

Since you have

db = {'user', 'user1', 'user2'}

The variable db is a set, which is not subscriptable. So when your code runs db[str(user)] (as part of the if condition), you get the error

TypeError: 'set' object is not subscriptable

This error is caught in your except block, and so your program sends the message saying you are not VIP.