class List:
    array: list

    def __init__(self):
        self.array = []

    def add(self):
        pass

    def get_by_index(self):
        pass

    def get_by_oid(self):
        pass

    def get_by_itself(self):
        pass

    def delete_by_index(self):
        pass

    def delete_by_oid(self):
        pass

    def delete_by_itself(self):
        pass