How to get the Exception from discord.on_error() ?

[rullinoiz]

I'm trying to implement custom errors in checks by having raises inside of them like so:

# in modules/checks.py
from discord.ext.commands import Context, check

def is_developer():
    def predicate(ctx: Context):
        if not ctx.author.id == (censored):
            raise AccessDenied(ctx.invoked_with)
        return True
    return check(predicate)

# in modules/exceptions.py
class AccessDenied(Exception):
    def __init__(self, action:str=None) -> None:
        self.action = action
        super().__init__('You do not have sufficient permissions to {0}'.format('perform this action.' if not action else f'"{action}".'))

however the error is caught by on_error rather than on_command_error. on_error has basically no context and I can't find any way to actually get the Exception from it to then send to the user

(the file in which i want error handling to happen is my main.py file, and these are also prefix-based commands (not app based))

[Rapptz]

You use sys.exc_info as documented:

For your custom exception you should derive CommandError instead so it goes to the appropriate events, as documented here.

[rullinoiz]

i started looking differently and reread CommandError and it has exactly what i need, its amazing how you look so hard for a solution but find it right after you ask for help. thanks though, if i hadn't found it then this would've led me in the right direction