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Here's something I implemented a while ago: http://zacharyvoase.github.com/urecord/

There are benefits to using tuples over objects/dictionaries: 1) Lower memory consumption 2) Faster lookups 3) Can be used as dictionary keys, set members, anywhere a hashable (immutable) object is required.

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That's funny. I implemented almost the exact same thing a few years ago, although mine is arguably more complete :)

https://github.com/pthatcher/pyrec

Here's my original post about it:

http://www.valuedlessons.com/2009/10/introducing-pyrec-cure-...

And here's my analysis of how much less memory it uses:

http://www.valuedlessons.com/2008/10/blog-post.html

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