[Twisted-Python] equivalent of flow.Cooperate for deferredGenerator

[Matt Goodall]

Manlio Perillo wrote:
> Hi.
> 
> What is the equivalent instruction for pause a deferredGenerator for n
> seconds.

I'm not sure what Cooperate actually does but if you just want to put a
deferredGenerator to sleep for some period of time then something like
this (untested) should work:

    seconds = 5
    d = defer.Deferred()
    reactor.callLater(seconds, lambda: d.callback(None))
    d = defer.waitForDeferred(d)
    yield d
    d.getResult()

That's ugly, but pulling the first 3 or 4 lines of that into a function
would tidy it up a lot.

- Matt

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