# Python program to demonstrate circular linked list traversal 
 
# Structure for a Node
class Node:
     
    # Constructor to create  a new node
    def __init__(self, data):
        self.data = data 
        self.next = None
 
class CircularLinkedList:
     
    # Constructor to create a empty circular linked list
    def __init__(self):
        self.head = None
 
    # Function to insert a node at the beginning of a
    # circular linked list
    def push(self, data):
        ptr1 = Node(data)
        temp = self.head
         
        ptr1.next = self.head
 
        # If linked list is not None then set the next of
        # last node
        if self.head is not None:
            while(temp.next != self.head):
                temp = temp.next
            temp.next = ptr1
 
        else:
            ptr1.next = ptr1 # For the first node
 
        self.head = ptr1 
 
    # Function to print nodes in a given circular linked list
    def printList(self):
        temp = self.head
        if self.head is not None:
            while(True):
                print "%d" %(temp.data),
                temp = temp.next
                if (temp == self.head):
                    break
 
 
# Driver program to test above function
 
# Initialize list as empty
cllist = CircularLinkedList()
 
# Created linked list will be 11->2->56->12
cllist.push(12)
cllist.push(56)
cllist.push(2)
cllist.push(11)
 
print "Contents of circular Linked List"
cllist.printList()

Create circular_linked_list.py