Find length of circular linked list in python

Python program for Find length of circular linked list . Here problem description and other solutions.

#  Python 3 program for
#  Count number of nodes in circular linked list 

#  Define class of linked list Node
class LinkNode :
	def __init__(self, data, first) :
		self.data = data
		self.next = first
	

class CircularLinkedList :
	#  Class constructor
	def __init__(self) :
		self.head = None
	
	#  Insert node at end of circular linked list
	def insert(self, value) :
		#  Create a new node
		node = LinkNode(value, self.head)
		if (self.head == None) :
			#  First node of linked list
			self.head = node
			node.next = self.head
		else :
			temp = self.head
			#  Find the last node
			while (temp.next != self.head) :
				#  Visit to next node
				temp = temp.next
			
			#  Add new node at the last 
			temp.next = node
		
	
	def countNode(self) :
		if (self.head == None) :
			return 0
		
		#  Start with second node
		temp = self.head.next
		#  This is used to count linked node
		count = 1
		#  iterate circular linked list
		while (temp != self.head) :
			count += 1
			#  Visit to next node
			temp = temp.next
		
		return count
	

def main() :
	cll = CircularLinkedList()
	#  Add nodes
	cll.insert(1)
	cll.insert(3)
	cll.insert(5)
	cll.insert(7)
	cll.insert(9)
	cll.insert(11)
	#  Display result
	print(cll.countNode())

if __name__ == "__main__": main()

Output

6