Nice, that's a clever use of decorators. A bit annoying that you need repeated "defs", though. Here's another approach based on Macropy (basically, macros for

Nice, that's a clever use of decorators. A bit annoying that you need repeated "defs", though. Here's another approach based on Macropy (basically, macros for Python): https://github.com/lihaoyi/macropy#pattern-matching https://github.com/lihaoyi/macropy#pattern-matching.