pickle module doens't work

[Omer Korat]

Hi all,

I'm working on a project in Python 2.7. I have a few large objects, and I want to save them for later use, so that it will be possible to load them whole from a file, instead of creating them every time anew. It is critical that they be  transportable between platforms. Problem is, when I use the 2.7 pickle module, all I get is a file containing a string representing the commands used to create the object. But there's nothing I can do with this string, because it only contains information about the object's module, class and parameters. And that way, they aren't transportable.
In python 3.3 this problem is solved, and the pickle.dump generates a series of bytes, which can be loaded in any other module independently of anything. But in my project, I need NLTK 2.0, which is written in python 2.7...

Anybody has suggestions? Maybe there is a way to use pickle so that it yields the results I need? Or is there any other module that does pickle's job? Or perhaps there is a way to mechanically translate between python versions, so I'll be able to use pickle from 3.3 inside an application written in 2.7? Or perhaps somebody knows of a way to embed a piece of 3.3 code inside a 2.7 program?

It can't be I'm the only one who wants to save python objects for later use! There must be a standard method to do this, but I couldn't find any on the web!
If someone can solve this for me I'll be so grateful.