shelf-like list?

[Thomas Jollans]

On Tuesday 10 August 2010, it occurred to kj to exclaim:
> I'm looking for a module that implements "persistent lists": objects
> that behave like lists except that all their elements are stored
> on disk.  IOW, the equivalent of "shelves", but for lists rather
> than a dictionaries.
> 
> Does anyone know of such a module?
> 
> (I suppose that I could slap together a crude implementation of
> such a thing by wrapping a shelf with suitable methods to simulate
> the list interface.  But I'd rather not roll my own if a tested
> implementation already exist.)

You could simply use pickle to save the data every once in a while.