def handles_error(self, fd, callback):
        return callback in self.handlers[fd]['error']
set attribute (namespaceURI, localName)=value
dataset/ETHPy150Open Shizmob/pydle/pydle/async.py/EventLoop.handles_error--crossover with--dataset/ETHPy150Open AppScale/appscale/AppServer/google/appengine/api/SOAPpy/wstools/Utility.py/MessageInterface.setAttributeNS