Python Linked List: Set a new value of an item in a singly linked list using index value
Write a Python program to set a new value of an item in a singly linked list using index value.
Sample Solution:
Python Code:
class Node:
# Singly linked node
def __init__(self, data=None):
self.data = data
self.next = None
class singly_linked_list:
def __init__(self):
# Createe an empty list
self.tail = None
self.head = None
self.count = 0
def append_item(self, data):
#Append items on the list
node = Node(data)
if self.head:
self.head.next = node
self.head = node
else:
self.tail = node
self.head = node
self.count += 1
def __getitem__(self, index):
if index > self.count - 1:
return "Index out of range"
current_val = self.tail
for n in range(index):
current_val = current_val.next
return current_val.data
def __setitem__(self, index, value):
if index > self.count - 1:
raise Exception("Index out of range.")
current = self.tail
for n in range(index):
current = current.next
current.data = value
items = singly_linked_list()
items.append_item('PHP')
items.append_item('Python')
items.append_item('C#')
items.append_item('C++')
items.append_item('Java')
print("Modify items by index:")
items[1] = "SQL"
print("New value: ",items[1])
items[4] = "Perl"
print("New value: ",items[4])
Sample Output:
Modify items by index: New value: SQL New value: Perl
Flowchart:
Python Code Editor:
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