[Spambayes] read-only DBDict in hammie?

[Skip Montanaro]

I'd like to share the anydbm file between several accounts on my machine.
Before I fiddle hammie.py so it opens the file in read-only mode, is there
any reason when classifying (not training) it actually needs to update the
file?  There's a __del__ method in PersistentBayes which does this:

    def __del__(self):
        #super.__del__(self)
        self.save_state()

    def save_state(self):
        self.wordinfo[self.statekey] = (self.nham, self.nspam)

When classifying there's no reason that nham or nspam would change, right?

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