Deeply nested dictionaries - should I look into a database or am I just doing it wrong?

[BlueBird]

I love named tuples, they rock for this kind of task: storing
complicated structure in a python compatible way, without too much
hassle.

And as far as load/save on disk is concerned, I simply use regular
python structure with safe eval [1]. I get all the flexibility that I
need for the file format, without the annoyance of writing a
conversion layer.

[1]: http://code.activestate.com/recipes/364469-safe-eval/