（Python3）将对象传递给导入的模块函数

Question

I am importing a module I created to a python file which I plan to run as main.

In the module, I have a function,

def coms(message, instRole):

where instRole is supposed to be an instance of a class

---

In my main python file, I have an object,

instRole = Role()

And I have a function:

def on_message(message):
    coms(message, instRole)

which I call on the next line:

on_message(m)

However, The function coms is never called. I have put in print statements in coms to make sure it is called, and it is not.

Thank you for your help ahead of time

Answer 1

If you're trying to take advantage of discord.py events, where your code would be executed whenever a message is seen by the bot, you have you define a coroutine (a function that uses the async def syntax) and use the bot.event decorator to register it with your bot. Below is a basic example:

from discord.utils import get
from discord.ext import commands
from other_file import coms

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

@bot.event
async def on_message(message):
    instRole = get(message.server.roles, id="123")  # Get the role with its id
    await coms(message, instRole)

bot.run("TOKEN")

If you want the coroutine in the other file to actually do something in discord, it's best to make that file a cog, which is a class that implements a specific functionality for a discord bot.

cog.py:

from discord.ext import commands

class Cog():
    def __init__(self, bot):
        self.bot = bot
    # Note no decorator
    async def on_message(self, message):
        await self.coms(message, instRole)
    async def coms(self, message, role):
        ...  # use self.bot instead of bot

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

main.py:

from discord.ext import commands 

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

cogs = ['cog']

if __name__ == "__main__":
    for cog in cogs:
        try:
            bot.load_extension(cog)
        except Exception:
            print('Failed to load cog {}\n{}'.format(extension, exc))

    bot.run('token')