Discord.py how to properly use @bot.check_once?

Question

Python

I have code:

import discord
from discord.ext import commands

bot = commands.Bot(command_prefix='!')


# Для удобства
@bot.event
async def on_ready():
    print('Бот готов - Online...')


# Проверка
@bot.check_once
def whitelist(ctx):
    if 1 > 0:
        print('1>0')


# Тест
@bot.command()
async def test(ctx):
    await ctx.send('Nice job!')


bot.run("TOKEN")

I need to make it so that when I write the !test command, the test should start, and if the test condition is true, then the !test command should continue executing.
I tried to do it in different ways, but everything is even, the code just does not continue to execute the !test...

Answer 1

The function in the Bot.check_once decorator should return a "bool-alike" value (any value that will be interpreted as a bool. Roughly speaking, anything that supports bool(var)).
For example:

WHITELIST = [990298932007060792]

@bot.check_once()
def whitelist(ctx):
    print(f"Check is triggered: {ctx.author} executed {ctx.command}")
    return ctx.author.id in WHITELIST  # Если ID пользователя в указанном выше списке - вернет True
    # В противном случае, результат будет оцениваться как False (функция без указания return возвращает None, а bool(None) == False