Method append

Merge_linked_list.py:27–35

(self, new_data)

    # Function to add of node at the end.
    def append(self, new_data):
        new_node = Node(new_data)

        if self.head is None:
            self.head = new_node
            self.tail = new_node
            return
        self.tail.next = new_node
        self.tail = self.tail.next


# Function to merge two sorted linked list.