Effectively insert node at beginning of circular linked list in python
Python program for Effectively insert node at beginning of circular linked list . Here problem description and other solutions.
# Python 3 Program
# Insert node at beginning of circular linked list
# Using head and tail nodes
# Define class of linked list Node
class LinkNode :
def __init__(self, data, first) :
# Set node value
self.data = data
self.next = first
class CircularLinkedList :
def __init__(self) :
self.head = None
self.tail = None
# Insert node at begining of circular linked list
def insert(self, value) :
# Create a node
node = LinkNode(value, self.head)
if (self.tail == None) :
# First node of linked list
self.tail = node
# Make new head
self.head = node
# Connecting the last node to the top of the next field
self.tail.next = self.head
# Display node element of circular linked list
def display(self) :
if (self.head == None) :
print("Empty Linked List")
else :
print("Linked List Element : ", end = "")
temp = self.head
# iterate linked list
while (temp != None) :
# Display node
print(temp.data, end = " ")
if (temp == self.tail) :
# Stop iteration
# Or break
return
# Visit to next node
temp = temp.next
def main() :
task = CircularLinkedList()
# Add following linked list nodes
task.insert(8)
task.insert(7)
task.insert(6)
task.insert(5)
task.insert(4)
task.insert(3)
task.insert(2)
task.insert(1)
# Display node
task.display()
if __name__ == "__main__": main()
Output
Linked List Element : 1 2 3 4 5 6 7 8
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