I really enjoyed the two posts by Christophe Grand about Datalog, [Writing the Worst Datalog Ever in 26loc](https://buttondown.com/tensegritics-curiosities/archive/writing-the-worst-datalog-ever-in-26loc/) and [Half Dumb Datalog in 30 loc](https://buttondown.com/tensegritics-curiosities/archive/half-dumb-datalog-in-30-loc/) (even more than the first one), so I ended up porting them to Python. There's a bunch of differences to the Clojure versions: - they are roughly twice as long - use generators and thus have to environment threading somewhat differently - a custom class for variables (no symbols in Python) - some dictionary copying is going on because of mutability (and I didn't want to think too much about when mutation is happening). The semi-naive implementation ended up being roughly 50 lines, which is pretty reasonable I thought. The code for them both is in this [Gist](https://gist.github.com/cfbolz/e93e561c5fedf5fba6b2069f250bcd8c):