discord.py how to not let user warn them selves code example

Example 1: check if user has manage messages discord.py

@client.event
async def on_message(message):
  message.author.guild_permissions.manage_messages # returns bool

Example 2: discord.py

import discord

client = discord.Client()

@client.event
async def on_ready():
    print('We have logged in as {0.user}'.format(client))

@client.event
async def on_message(message):
    if message.author == client.user:
        return

    if message.content.startswith('$hello'):
        await message.channel.send('Hello!')

client.run('your token here')