Python is well-known for being a “batteries included” language which means it comes with a rich variety of modules that work right out of the box. However this recent post about the regular expression library shows the problems that can occur from shipping such a wide variety of code as part of the language core. Maintaining a wide-ranging codebase is challenging as is keeping it aligned to a language’s release cadence.

The problems suggest that really the language should focus just on the core tools and syntax of the language with everything else being on a different release cycle. However by itself that core isn’t too useful for pragmatic coding purposes. Curation of code and having a sensible selection of libraries is a challenge. Some languages like Clojure and Elm have a controlled ecosystem of libraries that are adjacent to a small language core. However here the difference between curation and gatekeeping is fine and it feels like only languages with a large community can do it effectively.

Perhaps the answer is to have a basic implementation of core functionality in the core but to use the language documentation to suggest alternative libraries. This moves the problem to the documentation team but hopefully this is a simpler arena to both maintain and curate.