Summer’s over — what’s your move? Join Pro for 50% off using code [MAKEITHAPPEN](https://www.codecademy.com/checkout?periods=year&plan_id=proGoldAnnualV2&discountCode=MAKEITHAPPEN)


Nodes: Python

Now that you have an understanding of what nodes are, let's see one way they can be implemented using Python. 

We will use a basic node that contains data and one link to another node. The node's data will be specified when creating the node and immutable (can't be updated). The link will be optional at initialization and can be updated.

Remember that at the end of a node path, the link to the next node is null because there are no more nodes left. In Python, this means it will be set to `None`.



Nodes Python Introduction

We have a few zany characters to keep track of and Python nodes may do just the trick. Let's get started...

Python Nodes Review


We are only allowing the value of the node to be set upon creation. However, we want to allow updating the link of the node. For this, we will use a setter to modify the `self.link_node` attribute.

The method should be called `.set_link_node()` and should take `link_node` as an argument. It should then update the `self.link_node` attribute as appropriate.



Nodes Python Setter

We need methods to access the data and link within the node. For this, we will use two getters, `.get_value()` and `.get_link_node()`.

These should each return their corresponding value on the `self` object.

