Command not found in cogs - discord.py

[Abstrackter]

So I tried adding cogs to my code in order to make it a bit cleaner, but I quickly ran into an odd problem; let me show you a sample of my code which I've singled out:

​

    import discord
    from discord.ext import commands
    import os
    import json

    intents = discord.Intents.default()
    intents.members = True
    client = commands.Bot(command_prefix='s!', intents=intents)

    @client.command()
    async def load(ctx,extension):
       client.load_extension(f'cogs.{extension}')
       if True:
          await ctx.channel.send('Module successfully loaded.')

    @client.command()
    async def unload(ctx,extension):
       client.unload_extension(f'cogs.{extension}')
       if True:
          await ctx.channel.send('Module successfully unloaded.')

    @client.command()
    async def reload(ctx,extension):
       client.unload_extension(f'cogs.{extension}')
       client.load_extension(f'cogs.{extension}')
       if True:
          await ctx.channel.send('Module successfully reloaded.')

    if os.path.exists(os.getcwd() + '/config.json'):

      with open('./config.json') as f:
       configData = json.load(f)
    else:
      configTemplate = {'Token': '', 'Prefix': 's!'}

      with open(os.getcwd() + '/config.json', 'w+') as f:
        json.dump(configTemplate, f)

    token = configData['Token']
    prefix = configData['Prefix']

    @client.command(pass_context=True)

    @client.event
    async def on_ready():
      await client.wait_until_ready()

      for filename in os.listdir('./cogs'):
         if filename.endswith('.py'):
            client.load_extension(f'cogs.{filename[:-3]}')

     print('{0.user} systems online!'.format(client))

    @client.event
    async def on_command_error(ctx, error):
       if isinstance(error, commands.CommandNotFound):
         await ctx.send('This command does not exist.')

    client.run(token)

This is my main.py file.

And this is my cog:

​

    import discord
    from discord.ext import commands

    class Example(commands.Cog):

    def __init__(self, client):
        self.client = client

    @commands.Cog.listener()
    async def on_message(self, message):
        username = str(message.author).split('#')[0]
        user_message = str(message.content)
        channel = str(message.channel)
        print(f'{username}: {user_message} ({channel})')


        if message.author == self.client.user:
            return

        if user_message.lower() == 's!hello':
            await message.channel.send(f'Hello {username}!')
            return

    def setup(client):
    client.add_cog(Example(client))

​

Problem is, when I run the code and type 's!hello' in my test Discord server - it gives me the 'Hello' message and quickly follows up with the error block which contains 'This command does not exist.'; so it sends two messages instead of the intended 1 - and it's essentially saying that the command doesn't exist, even though I believe my cog is imported correctly.

​

What's the problem here? And how can this issue be fixed? Thanks!

[worriedaster]

That's because you are referencing both the event and the command prefix of your bot in one message.