# Write a Python program to find middle of a linked list using one traversal 
 # Python 3 program to find the middle of a  
# given linked list 
  
# Node class 
class Node: 
  
    # Function to initialise the node object 
    def __init__(self, data): 
        self.data = data 
        self.next = None 
  
class LinkedList:
  
    def __init__(self):
        self.head = None
  
    def push(self, new_data):
        new_node = Node(new_data)
        new_node.next = self.head
        self.head = new_node
  
    # Function to get the middle of 
    # the linked list
    def printMiddle(self):
        slow_ptr = self.head
        fast_ptr = self.head
  
        if self.head is not None:
            while (fast_ptr is not None and fast_ptr.next is not None):
                fast_ptr = fast_ptr.next.next
                slow_ptr = slow_ptr.next
            print("The middle element is: ", slow_ptr.data)
  
# Driver code
list1 = LinkedList()
list1.push(5)
list1.push(4)
list1.push(2)
list1.push(3)
list1.push(1)
list1.printMiddle()