[Twisted-Python] errorhandler example in docs needs work

Reading this in the manual: http://twistedmatrix.com/documents/current/howto/defer Example of how to write error handlers for exceptions: def errorHandler(failure): failure.trap(SpamException, EggException) # Handle SpamExceptions and EggExceptions d.addCallback(cookSpamAndEggs) d.addErrback(errorHandler) This example is missing something. The #handle SpamExceptions should have at least one statement after the # like print "I am handling the exception" I look at this example above and I still don't know how to write an error handler. I shall read further, but I wanted to share my feedback.