[Twisted-Python] callLater

Manlio Perillo manlio_perillo at libero.it
Mon Sep 4 12:02:51 EDT 2006


I need to implement a function for scheduling function calls at specific

A simple implementation is:

def callAt(when):
    from twisted.internet import reactor

    delta = when - datetime.now()
    delay = delta.days * 24 * 3600 + delta.seconds + delta.microseconds
/ 1000000.

    return reactor.callLater(delay)

However I'm going to have lots of this scheduled calls, many of these
are far away in the future.

Can this be a problem?

An alternative implementation is to use LoopingCall that, say, every 15
minutes, check the scheduled functions.
Here I can think of some optimization, to avoid a linear search.

Thanks  Manlio Perillo

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