Python tool for sharing-preserving transformations

Hi YAML users,

I'd like to share a small general-purpose Python function that I've 
written a couple of months ago. It can be used to perform custom 
transformations across a YAML document, such as

- reversing all sequences
- capitalizing all strings
- changing mappings with multiple entries into sequences of one-entry 
mappings

while preserving sharing (aliases). The first variant of the function is 
easier to use but does not support cyclic structures; the second variant 
does support them, but is a bit harder to understand.

http://code.activestate.com/recipes/578117-sharing-aware-tree-transformations/
http://code.activestate.com/recipes/578118-cycle-aware-tree-transformations/

Cheers,
Sander Evers

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