Deserializing specific objects from a file

[Aaron J. M.]

I'm building a game and am starting to seriously think about
serialization, though I haven't done much serialization before except
for a few experiments with the pickle module.

There are many objects that I want be able to move in and out of
memory at runtime; namely the game levels.  I only want one level in
memory at a time, so I want to be able to unpickle specific Level
objects as the player moves between levels.  I would prefer my
serialized objects to reside in one file.

I haven't come across references that say how to do something like
what I'm describing.  Does anyone here know what techniques I have to
employ here?

Thank you,

Aaron J. M.

P.S. Is it *deserialize* or *unserialize*?