[Python] How to use extensions/cogs in discord.py

This is the code I run to start the bot


# bot.py
import discord
from discord import app_commands
from discord.ext import commands, tasks
from itertools import cycle
import humanize
import random

bot = commands.Bot(command_prefix="?", intents=discord.Intents.all())

bot_status = cycle(["Wow.", "Isn't. This.", "Cool?"])


@tasks.loop(seconds=10)
async def change_status():
await bot.change_presence(activity=discord.Game(next(bot_status)))


@bot.event
async def on_ready():
try:
await bot.tree.sync()

print(f'Synced')
except Exception as e:
print(e)
print("Ready")
change_status.start()


def calculate_result(number):
if "M" in number.upper():
power = number.upper()
tp = int(power.replace("M", ""))
calc = 20000 + tp * 10
return humanize.intword(calc)
elif "B" in number.upper():
power = number.upper()
tp = int(power.replace("B", ""))
calc = 60000 + tp * 60
return humanize.intword(calc)
elif "T" in number.upper():
power = number.upper()
tp = int(power.replace("T", ""))
calc = 140000 + tp * 600
return humanize.intword(calc)
else:
return None


def number_conversion(durability):
if "K" in durability.upper():
power = durability.upper()
dura = int(power.replace("K", ""))
return dura * 1000
elif "M" in durability.upper():
power = durability.upper()
dura = int(power.replace("M", ""))
return dura * 1000000
elif "B" in durability.upper():
power = durability.upper()
dura = int(power.replace("B", ""))
return dura * 1000000000
elif "T" in durability.upper():
power = durability.upper()
dura = int(power.replace("T", ""))
return dura * 1000000000000
else:
return None


@bot.tree.command(name='sync', description='Owner only')
async def sync(interaction: discord.Interaction):
await bot.tree.sync()
await interaction.response.send_message('Command tree synced.')


@bot.command()
async def update_commands(ctx):
await bot.update_commands()


@bot.tree.command(name="hitcost")
@app_commands.describe(dura="The durability power of the person you wish to put a hit on")
async def calculate_command(interaction: discord.Interaction, dura: str):
result = calculate_result(dura)
if result is not None:
embed = discord.Embed(color=00000, title="Hit Cost")
embed.add_field(name=f"Cost for {dura.upper()}", value=f"{result}")
await interaction.response.send_message(embed=embed)
else:
await interaction.response.send_message("Invalid Power Level. Please use M, B, or T.", ephemeral=True)


bot.run("TOKEN")


Now I tried to move the commands / command function in another .py file (commands.py) using cogs and extensions (I tried both since I don't know which works better for what I'm trying). So that I can run bot.py with the command things moved to command.py (which I don't run) and it still works. But no matter how I try it doesn't work (probably because I can't use cogs/extensions). Can someone please give me an example code of how it would work so I can understand? would be appreciated

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