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python reverse linked list

Sahil Raj answered on April 16, 2022 Popularity 10/10 Helpfulness 5/10

answer python reverse linked list

python reverse linked list

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# Python program to reverse a linked list
# Time Complexity : O(n)
# Space Complexity : O(n) as 'next'
#variable is getting created in each loop.
 
# Node class
 
 
class Node:
 
    # Constructor to initialize the node object
    def __init__(self, data):
        self.data = data
        self.next = None
 
 
class LinkedList:
 
    # Function to initialize head
    def __init__(self):
        self.head = None
 
    # Function to reverse the linked list
    def reverse(self):
        prev = None
        current = self.head
        while(current is not None):
            next = current.next
            current.next = prev
            prev = current
            current = next
        self.head = prev
 
    # Function to insert a new node at the beginning
    def push(self, new_data):
        new_node = Node(new_data)
        new_node.next = self.head
        self.head = new_node
 
    # Utility function to print the LinkedList
    def printList(self):
        temp = self.head
        while(temp):
            print (temp.data,end=" ")
            temp = temp.next
 
 
# Driver program to test above functions
llist = LinkedList()
llist.push(20)
llist.push(4)
llist.push(15)
llist.push(85)
 
print ("Given Linked List")
llist.printList()
llist.reverse()
print ("\nReversed Linked List")
llist.printList()

Popularity 10/10 Helpfulness 5/10 Language python

Source: Grepper

Tags: linked-list python

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Contributed on Apr 16 2022

Sahil Raj

0 Answers Avg Quality 2/10

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reverse linked list with python

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def reverseList(self, head: Optional[ListNode]) -> Optional[ListNode]:

    previousNode, currentNode = None, head

    while currentNode:

        temp = currentNode.next
        currentNode.next = previousNode
        previousNode = currentNode
        currentNode = temp

    return previousNode

Popularity 10/10 Helpfulness 6/10 Language python

Source: eolnuha.com

Tags: linked-list link

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Contributed on Jul 05 2022

Eol Nuha

0 Answers Avg Quality 2/10

python reverse linked list

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reverse linked list with python

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