App commands in cogs annotated with `@staticmethod` error when loading

[Sophon96]

Summary

When defining commands with the @discord.app_commands.command() decorator with methods in a cog decorated with @staticmethod, a TypeError is raised with message "command function must be coroutine function."

Reproduction Steps

1. Create a cog
2. Define an app command with a function signature such as

@discord.app_commands.command()
@staticmethod
async def my_command(interaction: discord.Interaction):
  # ...

3. Add code to load the cog
4. Get TypeError: command must be coroutine function when running (though no type errors are reported by Pylance).

Such an example is attached in images (and see below):

Minimal Reproducible Code

import discord
from discord.ext import commands


class MyCog(commands.Cog):
    @discord.app_commands.command()
    @staticmethod
    async def my_command(interaction: discord.Interaction):
        await interaction.response.send("You will never see this")


class MyBot(commands.Bot):
    async def setup_hook(self):
        await self.add_cog(MyCog())


bot = MyBot("!", intents=discord.Intents.default())
bot.run("TOKEN")

Expected Results

A command is registered, as usual.

Actual Results

Traceback (most recent call last):
  File "/app/minrepo.py", line 5, in <module>
    class MyCog(commands.Cog):
  File "/app/minrepo.py", line 6, in MyCog
    @discord.app_commands.command()
     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/app/venv/lib/python3.11/site-packages/discord/app_commands/commands.py", line 1965, in decorator
    raise TypeError('command function must be a coroutine function')
TypeError: command function must be a coroutine function

Intents

Just the defaults (irrelevant)

System Information

- Python v3.11.5-final
- discord.py v2.3.2-final
- aiohttp v3.8.5
- system info: Linux 5.10.0-23-amd64 #1 SMP Debian 5.10.179-1 (2023-05-12)

Checklist

• I have searched the open issues for duplicates.
• I have shown the entire traceback, if possible.
• I have removed my token from display, if visible.

Additional Context

No response

[Rapptz]

staticmethod aren't supported for any type of commands due to limited usability and annoying to implement with regards to managing bindings. If you want this then define it outside of a class.

[Sophon96]

Thanks for replying.