python3-zc.customdoctests 1.0.1-3 (amd64 binary) in ubuntu kinetic

 doctest (and recently manuel) provide hooks for using custom doctest
 parsers. zc.customdoctests helps to leverage this to support other
 languages, such as JavaScript (with python-spidermonkey):
 .
     js> function double (x) {
     ... return x*2;
     ... }
     js> double(2)
     4
 .
 And with it facilitates doctests that mix multiple languages,
 such as Python, JavaScript, and sh.