issue#15_ReverseLinkedList.py

class Node: 
    def __init__(self, data):
        self.data = data
        self.next = None
 
 
class LinkedList:

    def __init__(self):
        self.head = None
 
    
    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
 
  
    def push(self, new_data):
        new_node = Node(new_data)
        new_node.next = self.head
        self.head = new_node
 
    
    def printList(self):
        temp = self.head
        while(temp):
            print(temp.data, end=" ")
            temp = temp.next
 
 

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()