Python program to sort the elements of the Circular Linked List
#Represents the node of list.
class Node:
def __init__(self,data):
self.data = data;
self.next = None;
class CreateList:
#Declaring head and tail pointer as null.
def __init__(self):
self.head = Node(None);
self.tail = Node(None);
self.head.next = self.tail;
self.tail.next = self.head;
#This function will add the new node at the end of the list.
def add(self,data):
newNode = Node(data);
#Checks if the list is empty.
if self.head.data is None:
#If list is empty, both head and tail would point to new node.
self.head = newNode;
self.tail = newNode;
newNode.next = self.head;
else:
#tail will point to new node.
self.tail.next = newNode;
#New node will become new tail.
self.tail = newNode;
#Since, it is circular linked list tail will point to head.
self.tail.next = self.head;
#This function sorts the list in ascending order
def sortList(self):
#Current will point to head
current = self.head;
if(self.head == None):
print("List is empty");
else:
while(True):
#Index will point to node next to current
index = current.next;
while(index != self.head):
#If current node is greater than index data, swaps the data
if(current.data > index.data):
temp = current.data;
current.data = index.data;
index.data = temp;
index= index.next;
current =current.next;
if(current.next == self.head):
break;
#Displays all the nodes in the list
def display(self):
current = self.head;
if self.head is None:
print("List is empty");
return;
else:
#Prints each node by incrementing pointer.
print(current.data, end= ' ');
while(current.next != self.head):
current = current.next;
print(current.data,end=' ');
print("\n");
class CircularLinkedList:
cl = CreateList();
#Adds data to the list
cl.add(70);
cl.add(90);
cl.add(20);
cl.add(100);
cl.add(50);
#Displaying original list
print("Original list: ");
cl.display();
#Sorting list
cl.sortList();
#Displaying sorted list
print("Sorted list: ");
cl.display();
Output:
Original list:
70 90 20 100 50
Sorted list:
20 50 70 90 100
