Program:

class node:
    def __init__(self,data=None):
        self.data=data
        self.next=None

class linked_list:
    def __init__(self):
        self.head=node()

    # Adds new node containing 'data' to the end of the linked list.
    def append(self,data):
        new_node=node(data)
        cur=self.head
        while cur.next!=None:
            cur=cur.next
        cur.next=new_node
        print("\n\t--->>>",data,"is successfully added in the Node")
        main_menu()

    # Returns the length (integer) of the linked list.
    def length(self):
        cur=self.head
        total=0
        while cur.next!=None:
            total+=1
            cur=cur.next
        return total

    # Prints out the linked list in traditional Python list format.
    def display(self):
        elems=[]
        cur_node=self.head
        while cur_node.next!=None:
            cur_node=cur_node.next
            elems.append(cur_node.data)
        print("\n\t--->>> Linked List-",elems,"\n")
        main_menu()

    # Returns the value of the node at 'index'.
    def get(self,index):
        if index>=self.length() or index<0: # added 'index<0' post-video
            print("ERROR: 'Get' Index out of range!")
            return None
        cur_idx=0
        cur_node=self.head
        while True:
            cur_node=cur_node.next
            if cur_idx==index:  return cur_node.data
            cur_idx+=1
     

    # Deletes the node at index 'index'.
    def erase(self,index):
        if index>=self.length() or index<0: # added 'index<0' post-video
            print("ERROR: 'Erase' Index out of range!")
            return
        cur_idx=0
        cur_node=self.head
        while True:
            last_node=cur_node
            cur_node=cur_node.next
            if cur_idx==index:
                last_node.next=cur_node.next
                return
            cur_idx+=1

  #object
L_list=linked_list()

def main_menu():
    print("\n************MAIN MENU***************")
    print("1. Add a new Node\n2. Display Link List")
    print("3. Display the SIZE of list")
    print("4. Value of Node at Index?:")
    print("5. Delete the Node of Index?:\n6. Exit")
    opt=int(input("\tEnter Your Option:"))

    if(opt==1):
        n=int(input("Enter the data in the Node:"))
        #for number input str()->>int()
        L_list.append(n)
   
    elif(opt==2):
        L_list.display()

    elif(opt==3):
        l=L_list.length()
        print("\n\t--->>> The Size of the Linked list is",l,"\n")
        main_menu()
     
    elif(opt==4):
        m=int(input("\tEnter the index: "))

        x=L_list.get(m)
        print("\n\t--->>>Value at Index",m," is ",x)
        main_menu()

    elif(opt==5):
        n=int(input("\tEnter the index: "))
        L_list.erase(n)
        print("\n\t--->>The node at Index ",n," is Deleted. ")
        L_list.display()
        main_menu()

    elif(opt==6):
        exit
               

    else:
        print("\n\t--->>>InValid Option\n")
        main_menu()


main_menu()