Re-reading the docs it looks like the only thing missing is get/set_bit for bit string.
Substring is already implemented for bit string, and I don't really know if replace is useful at all.
(sorry if the other mail came with a different sender name)
Leonardo
> I would like to work on "Allow substring/replace() to get/set bit values", since
> it looks like a simple task.
>
> The item is not marked as "easy" on the TODO though. Before proceding to a
> discussion on how this functions should be implemented (I got from the messages
> on the mailing list that bit substring/replace functions should do it) I would
> like to know if it's a complicated task.