[Tutor] Shelve & immutable objects

[Keith Winston]

So sorry, I hit return: here's the example:

import shelve
db = shelve.open('class-shelve')

sue = db['sue']
sue.giveRaise(.25)
db['sue'] = sue

tom = db['tom']
tom.giveRaise(.20)
db['tom'] = tom
db.close()

Is it possible to dispense with the assignment/reassignment and just use

(open shelve)
db['sue'].giveRaise(.25)
db['sue'].giveRaise(.25)
(close shelve)

or is the assignment (or bounding?) necessary to unshelve/reshelve the
items...
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