def on_error(self, fd, callback):
        self.handlers[fd]['error'].append(callback)
        self._update_events(fd)
Get a previously generated session, by its unique ID.
dataset/ETHPy150Open Shizmob/pydle/pydle/async.py/EventLoop.on_error--crossover with--dataset/ETHPy150Open kuri65536/python-for-android/python-modules/twisted/twisted/web/server.py/Site.getSession