[Python-Dev] Python 3.0.1

[Raymond Hettinger]

A couple additional thoughts FWIW:

* whichdb() selects from multiple file formats, so 3.0.1 would still
   be able to read 3.0.0 files.   It is the 2.x shelves that won't be
   readable at all under any scenario.

* If you're thinking that shelves have very few users and that
  3.0.0 has had few adopters, doesn't that mitigate the effects
  of making a better format available in 3.0.1?  Wouldn't this
  be the time to do it?

* The file format itself is not new or unreadable by 3.0.0.
   It is just a plain sqlite3 file.  Was is new is the ability
   of shelve's to call sqlite.  To me, that is something a little
   different than changing a pickle protocol or somesuch.
 

Raymond