Python Linked List: Create a doubly linked list, append some items and iterate through the list
Write a Python program to create a doubly linked list, append some items and iterate through the list (print forward).
Sample Solution:
Python Code:
class Node(object):
# Doubly linked node
def __init__(self, data=None, next=None, prev=None):
self.data = data
self.next = next
self.prev = prev
class doubly_linked_list(object):
def __init__(self):
self.head = None
self.tail = None
self.count = 0
def append_item(self, data):
# Append an item
new_item = Node(data, None, None)
if self.head is None:
self.head = new_item
self.tail = self.head
else:
new_item.prev = self.tail
self.tail.next = new_item
self.tail = new_item
self.count += 1
def print_foward(self):
for node in self.iter():
print(node)
def iter(self):
# Iterate the list
current = self.head
while current:
item_val = current.data
current = current.next
yield item_val
items = doubly_linked_list()
items.append_item('PHP')
items.append_item('Python')
items.append_item('C#')
items.append_item('C++')
items.append_item('Java')
print("Items in the Doubly linked list: ")
items.print_foward()
Sample Output:
Items in the Doubly linked list: PHP Python C# C++ Java
Flowchart:
Python Code Editor:
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