environment/lib/python2.7/site-packages/IPython/zmq/ipkernel.py
def _topic(self, topic):
        """prefixed topic for IOPub messages"""
        if self.int_id >= 0:
            base = "engine.%i" % self.int_id
        else:
            base = "kernel.%s" % self.ident
        
        return py3compat.cast_bytes("%s.%s" % (base, topic))
def _topic(self, topic):
        """prefixed topic for IOPub messages"""
        if self.int_id >= 0:
            base = "engine.%i" % self.int_id
        else:
            base = "kernel.%s" % self.ident
        
        return py3compat.cast_bytes("%s.%s" % (base, topic))
prefixed topic for IOPub messages