Tree transformation programs?

[Alex Martelli]

Edward C. Jones wrote:

> Are there any programs written in Python for transforming trees,
> especially AST trees? The input should be

Spark does do that, in part -- but it may not be a good match for
what you want because it focuses on scanning and then on parsing
to build the tree, as well as on processing (transforming) the
tree.  Still, it may be worth a look,

http://pages.cpsc.ucalgary.ca/~aycock/spark/


Alex