class Node(object):
    def __init__(self, val=None, pointer=None):
        self.val = val
        self.pointer = pointer


class LinkedList(object):
    def __init__(self, values=None, head=None):
        self.head = head
        self.length = 0


def size(self):
    pass

def search(self):
    pass

def display(self):
    pass

def remove(self):
    pass

def insert(self):
    pass

def pop(self):
    pass

Add basic structure and methods for linked list
Add basic structure and methods for linked list
