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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def save(self, key, kw):
 """ Update the object associated to `key` with the `kw` dictionary; works for LiteralAttrs objects and automatically flushes. """

        if key not in self:
            obj = hdf5.LiteralAttrs()
        else:
            obj = self[key]
        vars(obj).update(kw)
        self[key] = obj
        self.flush()