# Python Program to Count the Number of Occurrences of an Element in the Linked List using Recursion class Node:    def __init__(self, data):       self.data = data       self.next = None class LinkedList:    def __init__(self):        self.head = None        self.last_node = None     def append(self, data):        if self.last_node is None:            self.head = Node(data)            self.last_node = self.head        else:            self.last_node.next = Node(data)            self.last_node = self.last_node.next     def display(self):        current = self.head        while current:            print(current.data, end = ' ')            current = current.next     def count(self, key):        return self.count_helper(self.head, key)     def count_helper(self, current, key):        if current is None:            return 0         if current.data == key:            return 1 + self.count_helper(current.next, key)        else:            return self.count_helper(current.next, key) a_llist = LinkedList()for data in [7, 3, 7, 4, 7, 11, 4, 0, 3, 7]:    a_llist.append(data)print('The linked list: ', end = '')a_llist.display()print() key = int(input('Enter data item: '))count = a_llist.count(key)print('{0} occurs {1} time(s) in the list.'.format(key, count))