[Twisted-Python] Timing Out Deferreds

[Ken Kinder]

I've been trying to figure out an intelligent way of timing out 
deferreds. I'd like something like this...

    def myTimeoutMethod(...):
        ...

    d = whatnot()
    d.addCallback(...)
    d.addErrback(...)
    d.addTimeout(5, myTimeoutMethod)

There are obvious problems with trying to interrupt an existing 
deferred, but I was hoping there might be just some way of discarding 
its data when it finally does return, or dereferencing the deferred 
object itself from the reactor, which might just let it clean itself up 
on its own.

Thoughts?

-Ken