import discord
from discord.ext import commands

class Basic(commands.Cog):
    def __init__(self, bot):
        self.bot = bot

    @discord.slash_command(description="Greets the world.")
    async def sayhello(self, ctx):
        await ctx.respond('Hello world!')

    @discord.slash_command(description="Sends the bot's latency.")
    async def ping(self, ctx):
        await ctx.respond('My ping is {:.0f}ms'.format(self.bot.latency*1000), ephemeral=True)

def setup(bot):
    bot.add_cog(Basic(bot))