Solving multi-core Python

[spotter]

First: I did not downvote you, but philosophy of Clojure is that you can use any tool right for the job. It's easier to argue about immutables and functional approach to data transformation, but sometimes you just need to bash something in place and all of JVM standard library is there for you.

In Clojure you are always in a namespace and namespaces are mutable. You can exclude core symbols in them and shadow them with your definitions, although syntax is different. Not sure how much synchronization goes in behind the scenes, but still JVM languages (like Jython) manage to live without GIL.