I've given up on matching as I'm tired of running into its limitations. That said, I don't think OP's antics are a crime. That SyntaxError though, that might b

I've given up on matching as I'm tired of running into its limitations. That said, I don't think OP's antics are a crime. That SyntaxError though, that might be a crime. And a class-generating callable class would get around Python caching the results of __subclasshook__.