Inserting/Adding Elements Before The Given Node in The Linked List | Python Program

Inserting/Adding Elements Before The Given Node in The Linked List | Python Program

Inserting/Adding Elements Before The Given Node in The Linked List - In this Python Programming video tutorial you will learn about how to implement Linked List data structure in python in detail. Data structure is a way of st...

In this Python Programming video tutorial you will learn about how to implement Linked List data structure in python in detail.

Data structure is a way of storing and organising the data so that it can be accessed effectively. Linked List is a linear data structure made up of chain of nodes in which each node contains a data field and link or reference.

To implement Singly Linked List we are using class concepts here.

Program:

def add_before(self,data,x):

if self.head is None:

print("Linked List is empty!")

return

if self.head.data==x:

new_node = Node(data)

new_node.ref = self.head

self.head = new_node

return

n = self.head

while n.ref is not None:

if n.ref.data==x:

break

n = n.ref

if n.ref is None:

print("Node is not found!")

else:

new_node = Node(data)

new_node.ref = n.ref

n.ref = new_node

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