Anonymous

# Call as:def blah():    defer.maybeDeferred(blah.isSenderDenied("botanicus.net", "dw"))\        .addCallback(blah2)def blah2():    pass    def isSenderDenied(self, domain, mailbox):        if not self.deniedSendersLoaded:            return self.reloadDeniedSenders()\                .addCallback(self._cbIsSenderDenied, domain, mailbox)        return self._cbIsSenderDenied(None, domain, mailbox)    def _cbIsSenderDenied(self, lastResult, domain, mailbox):        deniedSenders = self._deniedSenders        if domain in deniedSenders:            for expr, (source, reason) in deniedSenders[domain].iteritems():                if fnmatch.fnmatch(mailbox, expr):                    return source, reason