I took the clear command from a random site, and the command clears the entire channel, why?

Question

Python

I took the 'clear' command code from the website random, I tested it, and the whole channel was cleared

@bot.command()
async def clear(ctx, amount=None):
    await ctx.channel.purge(limit=int(500))
    await ctx.channel.send(':: Сообщения успешно удалены')

Answer 1

Line Change to:
await ctx.channel.purge(limit=int(500))

await ctx.channel.purge(limit = 1) # для удаления сообщения которое вызывает команду
deleted = await ctx.message.channel.purge(limit=amount) #само удаление сообщений.

Answer 2

cleared the whole channel

Not news, but the last 500 messages.
If you understand at least a little the syntax of python (which I'm not particularly sure of because of the question), how to do it the way you need it - you will understand.