Fun.py

import discord
from discord.ext import commands


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

    @commands.command(description="Concatenates the string after called with a gnome",
                brief="Gnome's ya boi",
                pass_context=True)
    async def gnome(self,ctx, receiver):
        """Uses the receiver argument to concatinate a string to gnome anothuer user also mentions the author"""
        message = "{0} you've just been gnomed by {1} https://gyazo.com/6f0fe2316d674b1ff9b0a9b8d471b71d.png".format(receiver,
                                                                                                                 ctx.message.author.mention)
        await self.client.say(message)

    async def on_message(self,message):
        if message.author == self.client.user:
            return
        # if the user id posts a message in chat then it executes code
        if message.author.id == "146032122774159360" and message.server.id == "505113732456775690":
            await self.client.add_reaction(message, "👺")
            # if a message contains "boost" in any place and the server id is the one specified it will send a message
        if "boost" in message.content and message.server.id == "497091157591982081":
            await self.client.send_message(message.channel, "https://gyazo.com/2a785b68d62386ad3566f671c81e532c.png")

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