import discord
import asyncio
from discord.ext import commands

class Quote:
    def __init__(self, id, msg):
        self.id = id
        self.msg = msg

bot = commands.Bot(command_prefix = '-')

q = open("maxID.txt","r")
maxID = int(q.read())
q.close()

print(maxID)

temp = [0 for x in range(len(quotes))]
for i in range(0, len(quotes)):
    temp[i] = Quote(ids[i],quotes[i])
quotes = temp

@bot.event
async def on_ready():
    print('Logged in as')
    print(bot.user.name)
    print(bot.user.id)
    print('------')

@bot.event
async def on_message(message):
    await bot.process_commands(message)

@bot.command(pass_context=True)
async def ping(ctx):
    await ctx.channel.send('Pong!')
    print(maxID)

@bot.command(pass_context=True)
async def add(ctx, *, arg):
    quotes.append(Quote(maxID, arg))
    maxID = maxID + 1
    await ctx.channel.send('Added Quote #' + str(len(quotes)))

Ignoring exception in command add:
Traceback (most recent call last):
  File "C:UsersAcemcbeanAppDataRoamingPythonPython36site-packagesdiscordextcommandscore.py", line 62, in wrapped
    ret = yield from coro(*args, **kwargs)
  File "C:IzunaBotrun.py", line 51, in add
    quotes.append(Quote(maxID, arg))
UnboundLocalError: local variable 'maxID' referenced before assignment