Codecademy export

script.py

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

class LinkedList:
  def __init__(self, value=None):
    self.head_node = Node(value)
  
  def get_head_node(self):
    return self.head_node
  
  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 = []
    current_node = self.get_head_node()
    while current_node:
      if current_node.get_value() != None:
        string_list.append(current_node.get_value())
      current_node = current_node.get_next_node()
    return string_list
  
  def remove_node(self, value_to_remove):
    current_node = self.get_head_node()
    if current_node.get_value() == value_to_remove:
      self.head_node = current_node.get_next_node()
    else:
      while current_node:
        next_node = current_node.get_next_node()
        if next_node.get_value() == value_to_remove:
          current_node.set_next_node(next_node.get_next_node())
          current_node = None
        else:
          current_node = next_node
  
  def remove_all_specific_nodes(self, value_to_remove):
    count = self.stringify_list().count(value_to_remove)
    while (count != 0):
      self.remove_node(value_to_remove)
      count -= 1
    print("All instances of '{}' have been removed from the linked list.".format(value_to_remove))
    

ll = LinkedList(5)
for i in range(10, 21):
  ll.insert_beginning(i)
ll.insert_beginning(12)
ll.insert_beginning(12)
ll.remove_all_specific_nodes(12)
print(ll.stringify_list())