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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 filter_values(cls, part_info):
 # type: (Type[T], PartInfo) -> List[T] """Filter the part_info dict list looking for instances of our class Args: part_info (dict):
 {part_name: [Info] or None} as returned from Controller.run_hook() Returns: list: [info] where info is a subclass of cls """

        filtered = []
        for info_list in cls.filter_parts(part_info).values():
            filtered += info_list
        return filtered