Creating and changing global variable with async in Discord.py

Question

Is there a way that I can 1. Create a variable that can be used by different async def command(ctx, *, arg commands? such as

import discord
import asyncio
from discord.ext import commands


@bot.command(pass_context=True)
async def on_ready():
    print('Bot is online and ready.')
    #creates the global variable called like "baseNumberID"
async def command(ctx, *, arg):
    baseNumberID =+ 1
bot.run("TOKEN")

So what i want, is to have a variable created on launch that can then be changed/edited and/or added on to.

tdelaney · Accepted Answer · 2020-06-21 04:10:13Z

1

Yes. You can create module level variables and access them with the "global" keyword just like a non-asyncio function. The standard variable scoping rules apply like any other python function. Since your question isn't specific to discord and I don't happen to have discord, I've just updated a standard asyncio "hello world" program.

import asyncio

foo = 0

async def say(what, when):
    await asyncio.sleep(when)
    global foo
    foo += 1
    print(what, foo)

loop = asyncio.get_event_loop()
loop.run_until_complete(say('hello world', 1))
loop.close()

answered Jun 21, 2020 at 4:10

tdelaney

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4 Comments

EchoTheAlpha Over a year ago

I tried to incoperate this into my code, and it still says local variable 'baseNumberID' referenced before assignment

tdelaney Over a year ago

Did you include global baseNumberID at the top all functions that try to reassign it? As an aside, I noticed baseNumberID =+ 1 which just assigns +1 to the variable. Incrementing is baseNumberID += 1.

Ethan M-H Over a year ago

I will show some later if wanted, but if your making a discord bot you should make anything you want as a global variable an attribute of bot. You should check this out for usage on it, doing it this way also simplifies your code a fair bit. Here is the link

tdelaney Over a year ago

@EthanM-H - that's a good observation for OP's discord code. I was just focusing on the general async question.

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