Despite their reputation for being quick, my opinion is that Nintendo does often take their time. Most of the things they take down do exist for months or years (and also follow the same format of a ROM hack that got a lot of attention so easy copy paste). My assumption is they’re just dotting their i’s and crossing their t’s and patent is just what they think they’ll have the best chance at winning.
They do do it in C. The packages are written in C, python is just used as the wrapper to allow less coding skilled data scientists to easily use it.
That’s like the entire data science joke. It’s C in a python trench coat.