# Pastebin MlVJDNcG
here's a helper to simplify the interaction:
```
def pub(channel, *args, **kwargs):
    try:
        return cherrypy.engine.publish(channel, *args, **kwargs).pop()
    except ChannelFailures as cf:
        # Unwrap exception, which happened in channel
        raise cf.get_instances()[0] from cf
```