[Twisted-Python] A pseudo-deferred class that can be canceled

Terry Jones terry at jon.es
Tue Jan 5 07:55:31 EST 2010

Argh..... sorry, there was a trivial cut & paste error in the code I just
posted.  The errback method should of course be:

    def errback(self, fail=None):
        if not self._called:
            self._called = True
            defer.Deferred.errback(self, fail)


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