Useless loop in Budget code

[Lionel Sausin - Initiatives/Numérigraphe]

I noticed something weird in the code of Account Budget Lines.
It seems like no-op proxy functions have been introduced in this revision ages ago : revid:<email address hidden>

Here is the first (the other read mostly the same):
    def _prac(self, cr, uid, ids, name, args, context=None):
        res={}
        for line in self.browse(cr, uid, ids, context=context):
            res[line.id] = self._prac_amt(cr, uid, [line.id], context=context)[line.id]
        return res

Am I missing something, or is this just returning the exact same value as _prac_amt in a totally inefficient way?
Using browse() to get the ids is strange. And it's just rebuilding a dictionary it already has isn't it?