Can Linked Lists be only a single class?

I have created a linked list, but after looking on the internet I only see linked lists containing 2 classes, 1 node and 1 linked list class and now I am worried mine is not a linked list at all.

Below is code I have written for a linked list, but am now worried this isn’t a linked list and instead more similar to a binary tree.

import random
cache = {}
class Node:
    def __init__(self, data):
        
        self.head = None
        self.data = data

    def insert(self, data):
      if self.data:
        if self.head is None:
            self.head = Node(data)
        else:
            self.head.insert(data)
      else:
        self.data = data

    def PrintList(self):
      if self.head:
          self.head.PrintList()
      print( self.data ),

    def ListLength(self, length = 0):
      if self.head:
          return self.head.ListLength(length + 1)
      return length

    def PrintListRandomKnownNodes(self, randnode, count = 0):
        if randnode == count:
          return self.data
        
        if self.head:
          return self.head.PrintListRandomKnownNodes(nodeamount, count + 1)
        
        return self.data

    def printRandomUnknownNodes(self):
      
        if self.data:
            cache[self] = self.data

        if self.head:
            return self.head.printRandomUnknownNodes()
        
        res = random.choice(list(cache.values()))
        return res
 
LList = Node(1)

nodes = random.randrange(5, 10)

for x in range(0, 10):
  # LList.counter = LList.counter + 1
  LList.insert(x + random.randrange(5, 100))

LList.PrintList()

ListLength = LList.ListLength()
print("list length is ", ListLength)

randomNum = random.randint(0, ListLength)
print("randomnum",randomNum)

randomnode = LList.PrintListRandomKnownNodes(ListLength, randomNum)
print("random known node amount node data is:", randomnode)

cache = {}
randomunknownnode = LList.printRandomUnknownNodes()
print("random unknown node amount data is:", randomunknownnode)

Thanks.

>Solution :

Your code represents a singly linked list. The number of classes used to represent a data structure and what data structure those classes represent do not necessarily have any connection with each other.