linkedlist.py

# We'll be using our Node class
class Node:
  def __init__(self, value, next_node=None):
    self.value = value
    self.next_node = next_node
    
  def get_value(self):
    return self.value
  
  def get_next_node(self):
    return self.next_node
  
  def set_next_node(self, next_node):
    self.next_node = next_node

# Our LinkedList class
class LinkedList:
  def __init__(self, value=None):
    self.head_node = Node(value)
  
  def get_head_node(self):
    return self.head_node
  
# Add your insert_beginning and stringify_list methods below:
  def insert_beginning(self, new_value):
    new_node = Node(new_value)
    new_node.set_next_node(self.head_node)
    self.head_node = new_node
  def stringify_list(self):
    string_list = ''
    currentnode = self.get_head_node()
    while currentnode:
      if currentnode.get_value() != None:
        string_list += str(currentnode.get_value()) + "\n"
      currentnode = currentnode.get_next_node()
    return string_list
# Test your code by uncommenting the statements below - did your list print to the terminal?
ll = LinkedList(5)
ll.insert_beginning(70)
ll.insert_beginning(5675)
ll.insert_beginning(90)
print(ll.stringify_list())