Notes
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class Node:
def __init__(self, data):
self.data = data
self.next = None
class LinkedList:
def __init__(self):
self.head = None
self.last_node = None
def Start(self,data):
new_node = Node(data)
new_node.next=self.head
self.head=new_node
def End(self, data):
if self.last_node is None:
self.head = Node(data)
self.last_node = self.head
else:
self.last_node.next = Node(data)
self.last_node = self.last_node.next
def Display(self):
current = self.head
if self.head==None:
print("Empty Linked List")
while current is not None:
print(current.data, end = ' ')
current = current.next
l = LinkedList()
print("n1. Insert at Start n2. Insert at End n3. Insert After Item n4. Insert Before Item n5. Insert at Specified Index n6. To get node count n7. Search item n8. Delete Operation n9. Exit n0. Display")
while True:
c=int(input("Enter Your Choice: "))
if c==1:
n=int(input("Enter a Number : "))
l.Start(n)
elif c==2:
n = int(input('How many elements would you like to add? '))
for i in range(n):
data = int(input('Enter data item: '))
l.End(data)
elif c==0:
print('The linked list: ', end = '')
l.Display()
elif c==9:
sys.exit(0)
else:
print("Enter Valid Option")
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