﻿ Python Linked List: Delete a specific item from a given doubly linked list - w3resource

# Python Linked List: Delete a specific item from a given doubly linked list

## Python Linked List: Exercise-14 with Solution

Write a Python program to delete a specific item from a given doubly linked list.

Sample Solution:

Python Code:

``````class Node(object):
def __init__(self, value=None, next=None, prev=None):
self.value = value
self.next = next
self.prev = prev

def __init__(self):
self.tail = None
self.count = 0

def append_item(self, value):
# Append an item
new_item = Node(value, None, None)
else:
new_item.prev = self.tail
self.tail.next = new_item
self.tail = new_item
self.count += 1

def iter(self):
# Iterate the list
while current:
item_val = current.value
current = current.next
yield item_val

def print_foward(self):
for node in self.iter():
print(node)

def search_item(self, val):
for node in self.iter():
if val == node:
return True
return False

def delete(self, value):
# Delete a specific item
node_deleted = False
if current is None:
node_deleted = False

elif current.value == value:
node_deleted = True

elif self.tail.value == value:
self.tail = self.tail.prev
self.tail.next = None
node_deleted = True

else:
while current:
if current.value == value:
current.prev.next = current.next
current.next.prev = current.prev
node_deleted = True
current = current.next

if node_deleted:
self.count -= 1

items.append_item('PHP')
items.append_item('Python')
items.append_item('C#')
items.append_item('C++')
items.append_item('Java')
items.append_item('SQL')

print("Original list:")
items.print_foward()

items.delete("Java")
items.delete("Python")
print("\nList after deleting two items:")
items.print_foward()
```
```

Sample Output:

```Original list:
PHP
Python
C#
C++
Java
SQL

List after deleting two items:
PHP
C#
C++
SQL
```

Flowchart:

Python Code Editor: