Can the Node __init__ method be used in the insert_beginning method to point the new Node to the existing start of the list?


#1

Question

For this exercise, can the Node __init__() method be used in the insert_beginning() method to point the new Node to the existing start of the list?

Answer

Yes, since the __init__() method has a parameter which can set the value for next_node, the insert_beginning() can pass the existing value for self.head_node as the parameter when the new object is created. This would simplify the insert_beginning() to the following code.

    def insert_beginning(self, new_value):
        new_node = Node(new_value, self.head_node)
        self.head_node = new_node