chadawagner

@auvipy I just monkeypatched that active_queues method to return a list rather than a set. Solved my problem but it could be a breaking change if anyone were doing something...

Hi @essnine - I forgot to look at open issues first, but opened [this PR](https://github.com/verloop/twirpy/pull/50) earlier this week. Since it seems you've also been thinking about this, please let me...

I can confirm experiencing this issue as well. It seems like there should be an IsLayerType classmethod on the Layer base class, which would just return False. I added this...

``` def quiet(*args, **kwargs): pass from ply import yacc, lex yacc.PlyLogger.warning = quiet lex.PlyLogger.warning = quiet ```