How do I implement a circular linked list in Python?

How do I implement a circular linked list in Python?

To implement a circular linked list in Python, you can create a Node class and a CircularLinkedList class. Would you like to see the code?

Yes, please show me the code!

Here's a simple implementation:

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

class CircularLinkedList:
    def __init__(self):
        self.head = None

    def append(self, data):
        new_node = Node(data)
        if not self.head:
            self.head = new_node
            new_node.next = self.head
        else:
            current = self.head
            while current.next != self.head:
                current = current.next
            current.next = new_node
            new_node.next = self.head

# Example usage:
cll = CircularLinkedList()
cll.append(1)
cll.append(2)
cll.append(3)

How do I traverse the circular linked list?

To traverse a circular linked list, you can start from the head and continue until you reach the head again. Here's how:

def traverse(self):
    if not self.head:
        return
    current = self.head
    while True:
        print(current.data)
        current = current.next
        if current == self.head:
            break