Is it possible to use a decorator inside a command?

Question

Python

It is necessary that the command goes on cooldown only if all arguments are present, and if they are absent, it does nothing.
For example:

@commands.command()
async def say(ctx, arg = None):
    if arg == None:
        pass
    else:
        @commands.cooldown(1, 500, type = BucketType.member)
        await ctx.send(arg)

Answer 1

https://discordpy.readthedocs.io/en/stable/ext/com...

@commands.command(cooldown_after_parsing=True)
async def cmd(ctx, ...):
    """..."""
    ...

Answer 2

No. Since decorators are just sugar over a regular closure, wrapping the construct won't work.
You can take it out into a separate function or method and wrap it already.