vote_counter.py

import asyncio
import discord
from discord.ext import commands
from collections import Counter


class FooCog:
    THUMBS_UP = '\U0001ff4d'
    THUMBS_DOWN = '\U0001ff4e'

    def __init__(self, bot: commands.Bot):
        self.bot = bot

    @commands.group(pass_context=True)
    async def foo(self, ctx: commands.Context):
        """Group docs"""

    @foo.command()
    async def bar(self, ctx: commands.Context):
        """Subcommand docs"""
        msg: discord.Message = await ctx.send(f'Voting has begun: React with {self.THUMBS_UP} or {self.THUMBS_DOWN}')
        await msg.add_reaction(self.THUMBS_UP)
        await msg.add_reaction(self.THUMBS_DOWN)
        await asyncio.sleep(120)
        await msg.remove_reaction(self.THUMBS_UP)
        await msg.remove_reaction(self.THUMBS_DOWN)
        msg = await ctx.get_message(msg.id)
        votes = Counter({str(reaction.emoji): reaction.count for reaction in msg.reactions})
        await ctx.send(f'Total votes:\n'
                       f'{self.THUMBS_UP}: {votes[self.THUMBS_UP]:d}\n'
                       f'{self.THUMBS_DOWN}: {votes[self.THUMBS_DOWN]:d}')


def setup(bot: commands.Bot):
    bot.add_cog(FooCog(bot))