> I didn't know what data (types) were passed around when looking at parts of the code, so I had to look were the data structures were created, adapted and pass

> I didn't know what data (types) were passed around when looking at parts of the code, so I had to look were the data structures were created, adapted and passed along to actually know more (or just debug it) It's even better when all those data structures are just dicts, because it's too cumbersome to make serializable classes, so good luck figuring out what fields are in which.