In article <mailman.2293.1319834877.27778.python-l...@python.org>,
 Gelonida N <gelon...@gmail.com> wrote:

> I would like to save many dicts with a fixed amount of keys
> tuples to a file  in a memory efficient manner (no random, but only
> sequential access is required)

There's two possible scenarios here.  One, which you seem to be 
exploring, is to carefully study your data and figure out the best way 
to externalize it which reduces volume.

The other is to just write it out in whatever form is most convenient 
(JSON is a reasonable thing to try first), and compress the output.  Let 
the compression algorithms worry about extracting the entropy.  You may 
be surprised at how well it works.  It's also an easy experiment to try, 
so if it doesn't work well, at least it didn't cost you much to find out.
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