Create and Display a Circular Linked List in Python

When it is required to create a circular linked list and display it, a 'Node' class needs to be created. In this class, there are two attributes, the data that is present in the node, and the access to the next node of the linked list. In a circular linked list, the head and the rear are adjacent to each other. They are connected to form a circle, and don't have 'NULL' value in the last node.

Another 'linked_list' class needs to be created that would have an initialization function, and the head of the node would be initialized to 'None'. 

Below is a demonstration for the same −

Example

Live Demo

class Node:
   def __init__(self, my_data):
      self.data = my_data
      self.next = None

class linked_list:
   def __init__(self):
      self.head = None      
   def add_data(self,my_data):
      new_node = Node(my_data)
      new_node.next = self.head
      self.head = new_node  
   def print_it(self):
      temp = self.head
      while(temp):
         print(temp.data)
         temp = temp.next

my_list = linked_list()
my_list.add_data(47)
my_list.add_data(89)
my_list.add_data(34)
my_list.add_data(11)

print("The circular linked list is : ")
my_list.print_it()

Output

The circular linked list is :
11
34
89
47

Explanation

• The 'Node' class is created.
• Another 'linked_list' class with required attributes is created.
• Another method named 'add_data' is defined, that is used to add data to the circular linked list.
• Another method named 'print_it' is defined that is used to display the linked list data on the console.
• An object of the 'linked_list' class is created, and the methods are called on it to add data.
• This is displayed on the console using the 'print_it' method.