Need help on reducing cognitive complexity

Hi everyone,

I have a code block with high cognitive complexity below:

    @staticmethod
    def in_circle_check(obj_type, item, uuid, item_is_array=False):

        if obj_type not in ['trees', 'flowers']:
            return None

        plant = get_plant_with_circles(uuid)
        if not plant:
            return None

        if obj_type == 'trees':
            if plant['in_all_tree_types']:
                return True
            circle_objects = plant['tree_circle']['items']
        else:
            if plant['in_all_flower_types']:
                return True
            circle_objects = plant['flower_circle']['items']

        if isinstance(circle_objects, list):
            if item_is_array:
                for item in item:
                    if item not in circle_objects:
                        return -1
                return True
            else:
                if item in circle_objects:
                    return True
        else:
            return -1

        return -1


I try to move the first 3 if statements on the beginning of the block into new methods but that maneuver ends up with raising complexity.

Can anybody help me to learn how to reduce cognitive complexity in code blocks like this?

Kind regards,

Sencer HAMARAT

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