discord.py cog classes

                                    class Test(commands.cog):

    def __init__(self, client):
        self.client = client
        self._last_member = None

                                    import os
import discord
from discord.ext import commands

prefix = "?"
cogs_folder="./cogs"

bot = commands.Bot(command_prefix=prefix)

for file in cogs_folder:
  if file.endswith(".py"):
    try:
      bot.load_extension(f"cogs.{file[:-3]}")
      print(f"Loaded: {file}")
    except:
      print(f"Could not load: {file}")