From: Artyom

main.py

        def save_all(*values: Any) -> List[Any]:
            res = []  # not all cases have hashable objects
            for i in values:
                if i is not None and i not in res:
                    res.append(i)
            return res

        def submerge(*values: Any) -> List[Any]:
            res = []
            for value in values:
                if value is not None:
                    if isinstance(value, (list, set, tuple)):
                        res.extend(value)
                    else:
                        res.append(value)
            return res

        handlers = {
            cls.MERGE_TYPE_AVER: aver,
            cls.MERGE_TYPE_ANY: _any,
            cls.MERGE_TYPE_SAVE_ALL: save_all,
            cls.MERGE_TYPE_SUBMERGE: submerge,
        }

        # fields that are described how to merge
        explicit_merge_fields = {
            field
            for fields in field_merge_map.values()
            for field in fields
        }

        # all unknown fields have merge type "any"
        implicit_merge_fields = {
            field
            for page in pages
            for field in page.data.keys()
            if field not in explicit_merge_fields
        }

        if field_merge_map.get(cls.MERGE_TYPE_ANY):
            implicit_merge_fields.update(field_merge_map[cls.MERGE_TYPE_ANY])

        field_merge_map[cls.MERGE_TYPE_ANY] = implicit_merge_fields

        merged_data = {}
        for handler_type, fields in field_merge_map.items():
            for field in fields:
                field_values = [page.data[field] for page in pages if field in page.data]
                handler = handlers[handler_type]
                merged_data[field] = handler(*field_values)

        return merged_data -остаток