LinkedList in Python, Python 3

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# This program is an example of how to create a LinkedList in Python.
#
#
#
#
# NODE CLASS
class Node:
    def __init__(self, data): # Method to initialise the node object.
        self.data = data      # The data to be stored in the node.
        self.next = None      # Variable to store the object of the next node.

def add(self, data):
        if self.next != None:   # Checking if the 'next' object has some value in it.
            self.next.add(data) # If the 'next' node has already been initialised then pass the data to it.
        else:
            self.next = Node(data) # If the 'next' node has no value assigned to it, then assign an object to it.

def nodePrint(self):
        ending = " -> " if self.next else "" # Deciding whether to print an arrow or not. (Depends on whether their is another node after this).
        type_of_data = str(type(self.data)) # Getting the type of the data and converting to string.
        # In Python a string has the type: <class 'str'>
        # The line below takes only the useful part and prints it..
        type_of_data = type_of_data[7 : len(type_of_data) - 1]
        print(self.data, type_of_data, sep = " : ", end = ending)
        
        # If their is another node after this, then print it as well.
        if self.next:
              self.next.nodePrint()

# LINKEDLIST CLASS
class LinkedList:
    
    # Method to create the 
    def __init__(self):
        self.head = None
    
    # Method to add a new node to the 
    def add(self, data): 
        if self.head:
            self.head.add(data)
        else:
            self.head = Node(data)
            
    # Method to print the linked-list.
    def listPrint(self):
        self.head.nodePrint()

# MAIN PROGRAM START
linked = LinkedList()

linked.add(5)
linked.add("name")
linked.add(True)

linked.listPrint()
# MAIN PROGRAM END

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Absolute running time: 0.15 sec, cpu time: 0.02 sec, memory peak: 8 Mb, absolute service time: 0,29 sec