>>>>> "Michael" == Michael P Soulier <msoul...@digitaltorque.ca> writes:
Michael> I'm a bit confused as to the "visual explanation". It seems like Michael> if you have a single callback and errback, that if the errback Michael> wants to swallow the error, the callback will not be called at Michael> all, since deferred processing will look for the second callback Michael> at that point by the diagram. Michael> So, right now I'm calling my own callback from the errback if I Michael> want to swallow the error. Is there a better way? Yes. Add the errback to the deferred and then add the callback. d = somethingReturningADeferred() d.addErrback(cleanup) d.addCallback(dealWithResult) If cleanup doesn't return the failure object it's passed or raise some an exception, processing will pass to dealWithResult. Note that dealWithResult will get as an argument whatever cleanup returns (that means None if cleanup doesn't explicitly return something). You're thinking about this in the right way. Understanding the difference between the above and d = somethingReturningADeferred() d.addCallbacks(dealWithResult, cleanup) is important. Terry _______________________________________________ Twisted-Python mailing list Twisted-Python@twistedmatrix.com http://twistedmatrix.com/cgi-bin/mailman/listinfo/twisted-python
