Proposed change looks more like an enhancement like a bug fix.

I consider that features are not welcome anyone in the asyncore module, since it's now deprecated, replaced with selectors and asyncio.

I would prefer to reject this issue.

Giampaolo, Serhiy, Guido: what do you think?


> Every user has to implement the closing once logic in dispatcher subclasses.

Even if it's painful, I consider that it's an acceptable compromise.