Completed 7.2-shelve.
Completed 7.3-anydbm.  The change to 7.2-shelve is a change to a comment and some whitespace removal.
Completed 7.4-whichdb. Because I know this has all been changed in python3, I wrote this file to work equally in either python2 or python3.  They are minor changes, and this shows the differences.
updated 7.4-whichdb