[mod_python] python to javascript lib

This group seem like the folks who would know about this.

Is there a Python lib or module that will translate python data structures into javascript and vice-versa?  Some implememtations of WDDX do this and it's sooo handy.

If there isn't one, I'll write one and share it.  But if there is one, it would save me a lot 
of time. :)

 - thanks,
 - andy c