environment/lib/python2.7/site-packages/IPython/parallel/client/client.py
def _unwrap_exception(self, content):
        """unwrap exception, and remap engine_id to int."""
        e = error.unwrap_exception(content)
        # print e.traceback
        if e.engine_info:
            e_uuid = e.engine_info['engine_uuid']
            eid = self._engines[e_uuid]
            e.engine_info['engine_id'] = eid
        return e
def _unwrap_exception(self, content):
        """unwrap exception, and remap engine_id to int."""
        e = error.unwrap_exception(content)
        # print e.traceback
        if e.engine_info:
            e_uuid = e.engine_info['engine_uuid']
            eid = self._engines[e_uuid]
            e.engine_info['engine_id'] = eid
        return e
unwrap exception, and remap engine_id to int.