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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 to_items(self, func=str):
 """ Contruct a list of dictionary items. The items are normalized using: - A sort function by key (for consistent results) - A transformation function for values The transformation function will default to `str`, which is a good choice when encoding values as part of a response; this requires that complex types (UUID, Enum, etc.) have a valid string encoding. The transformation function should be set to `identity` in cases where raw values are desired; this is normally necessary when passing page data to controller functions as kwargs. """

        return [
            (key, func(self.kwargs[key]))
            for key in sorted(self.kwargs.keys())
        ]