pickle problem

[Gribouillis]

Can I now approach the pickle file and say "Give me the 7th object" ?

I don't think you can do that. Pickle does not provide random access. The closest object that I can think of is the persistent.list.PersistentList class available in the zodb pakckage. It stores a persistent list of objects in pickle format and provides random access, but using zodb might be overkill for what you want to do. Another alternative is to use a shelve which is a persistent dictionary storing pickled objects, provided by the python standard library. I have not used shelve in the last 20 years and I found that it was slow the last time I did it.