Single Ll
# def delete(self, data):
# if self.head is None:
# return
# if self.head.data == data:
# self.head = self.head.next
# return
# curr_node = self.head
# while curr_node.next is not None:
# if curr_node.next.data == data:
# curr_node.next = curr_node.next.next
# return
# curr_node = curr_node.next
class Node:
def __init__(self, data):
self.data = data
self.next = None
class LinkedList:
def __init__(self):
self.head = None
# Insert a new node at the beginning of the linked list
def insert_at_beginning(self, data):
new_node = Node(data)
new_node.next = self.head
self.head = new_node
# Insert a new node at a particular position of the linked list
def insert_at_position(self, data, position):
if position == 0:
self.insert_at_beginning(data)
return
new_node = Node(data)
current = self.head
for i in range(position - 1):
if current.next is None:
raise IndexError("Position out of range")
current = current.next
new_node.next = current.next
current.next = new_node
# Insert a new node at the end of the linked list
def insert_at_end(self, data):
new_node = Node(data)
if self.head is None:
self.head = new_node
return
current = self.head
while current.next is not None:
current = current.next
current.next = new_node
# Delete the first node of the linked list
def delete_at_beginning(self):
if self.head is None:
raise Exception("List is empty")
self.head = self.head.next
# Delete the last node of the linked list
def delete_at_end(self):
if self.head is None:
raise Exception("List is empty")
if self.head.next is None:
self.head = None
return
current = self.head
while current.next.next is not None:
current = current.next
current.next = None
# Delete a node at a particular position of the linked list
def delete_at_position(self, position):
if self.head is None:
raise Exception("List is empty")
if position == 0:
self.head = self.head.next
return
current = self.head
for i in range(position - 1):
if current.next is None:
raise IndexError("Position out of range")
current = current.next
current.next = current.next.next
# Print the linked list
def print_list(self):
current = self.head
while current is not None:
print(current.data, end=" ")
current = current.next
print()
# Create a new linked list object
my_list = LinkedList()
# Insert nodes
my_list.insert_at_end(1)
my_list.insert_at_end(2)
my_list.insert_at_end(3)
my_list.insert_at_end(4)
my_list.insert_at_end(5)
# Print the linked list
my_list.print_list() # Output: 1 2 3 4 5
# Delete nodes
my_list.delete_at_beginning()
my_list.delete_at_end()
my_list.delete_at_position(2)
# Print the linked list
my_list.print_list() # Output: 2 3 5