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    <p>This is basically demiurgus' solution with the rough edges made round. It retains his basic idea, but prevents RuntimeErrors and busy loops and is tested. [Edit: resolved issues with modifying the scheduler during _delay]</p> <pre><code>class asynschedcore(sched.scheduler): """Combine sched.scheduler and asyncore.loop.""" # On receiving a signal asyncore kindly restarts select. However the signal # handler might change the scheduler instance. This tunable determines the # maximum time in seconds to spend in asycore.loop before reexamining the # scheduler. maxloop = 30 def __init__(self, map=None): sched.scheduler.__init__(self, time.time, self._delay) if map is None: self._asynmap = asyncore.socket_map else: self._asynmap = map self._abort_delay = False def _maybe_abort_delay(self): if not self._abort_delay: return False # Returning from this function causes the next event to be executed, so # it might be executed too early. This can be avoided by modifying the # head of the queue. Also note that enterabs sets _abort_delay to True. self.enterabs(0, 0, lambda:None, ()) self._abort_delay = False return True def _delay(self, timeout): if self._maybe_abort_delay(): return if 0 == timeout: # Should we support this hack, too? # asyncore.loop(0, map=self._asynmap, count=1) return now = time.time() finish = now + timeout while now &lt; finish and self._asynmap: asyncore.loop(min(finish - now, self.maxloop), map=self._asynmap, count=1) if self._maybe_abort_delay(): return now = time.time() if now &lt; finish: time.sleep(finish - now) def enterabs(self, abstime, priority, action, argument): # We might insert an event before the currently next event. self._abort_delay = True return sched.scheduler.enterabs(self, abstime, priority, action, argument) # Overwriting enter is not necessary, because it is implemented using enter. def cancel(self, event): # We might cancel the next event. self._abort_delay = True return sched.scheduler.cancel(self, event) def run(self): """Runs as long as either an event is scheduled or there are sockets in the map.""" while True: if not self.empty(): sched.scheduler.run(self) elif self._asynmap: asyncore.loop(self.maxloop, map=self._asynmap, count=1) else: break </code></pre>
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    1. POPython's asyncore to periodically send data using a variable timeout. Is there a better way?
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    1. USHelmut Grohne
    1. USHelmut Grohne
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    1. This table or related slice is empty.
 

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