Python's StringIO for Clojure

Question

Is there something equivalent to Python's StingIO for Clojure?

I'm trying to write a report generating/literate programming system similar to Sweave and Pweave for Clojure. I'm currently using a temp file, but I'd prefer using something similar to StringIO.

Answer 1

with-out-str is pretty handy.

(let [foo (with-out-str (println "Hello world!"))] 
   foo)

More documentation here

Answer 2

java.io.StringWriter: http://download.oracle.com/javase/6/docs/api/java/io/StringWriter.html