[3pt14159]

I used to do that, but pickle bit me once. I think it changes between versioning or something. I had to start the statistical model from scratch.

[mattgreenrocks]

Now that you mention it, I remember running into something like it. It's a big issue. That module had a bunch of scar code to migrate entities as they came up from disk.

[rcxdude]

Yeah, I wouldn't use pickle for anything where backwards or forwards compatibility is important. It is however very convenient for 'I want to send/store this data for a bit' tasks.