Insertion at the beginning of Linked list | Python ???? for Beginners

????Code for insertion:
class Node:
def __init__(self, data):
self.data = data
self.next = None
# Creating nodes
node1 = Node(10)
node2 = Node(20)
node3 = Node(30)
node4 = Node(40)
# Connecting nodes
node1.next = node2
node2.next = node3
node3.next = node4
# Adding a new node at the beginning
head=node1
new_node = Node(50)
new_node.next = head
head = new_node

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