linkedlist-add-python.py

class Node:
    """Node represents a single node of a linked list"""

    def __init__(self, val):
        self.val = val
        self.next = None

    def __str__(self):
        return str(self.val) + " -> " + str(self.next)

class LinkedList:

    def __init__(self):
        self.head = None
        self.tail = None
    
    def add(self, val):
        if(not self.head):
            node = Node(val)
            self.head = node
            self.tail = node
        else:
            node = Node(val)
            self.tail.next = node
            self.tail = node

    def __str__(self):
        return str(self.head)


def main():
    list = LinkedList()
    list.add(1)
    list.add(2)
    list.add(3)
    
    print(list)

if __name__ == "__main__":
    main()