Write about the following:

$-$ what it does

$-$ how it works

$-$ the data structure$($s$)$ it uses

$-$ other insights you discovered"""

File: node.py

Author: Ken Lambert, copyright $2015,2020$

Used by permission.

$"""$

class Node$($object$)$:

$"""$Represents a singly linked node."""

# Constructor

def $\_\_$init$\_\_($self$,$ data, next $=$ None$)$:

$"""$Instantiates a Node with default next of None."""

self.data $=$ data

self.next $=$ next

class TwoWayNode$($Node$)$:

$"""$Represents a doubly linked node."""

# Constructor

def $\_\_$init$\_\_($self$,$ data $=$ None, previous $=$ None, next $=$ None$)$:

$"""$Instantiates a TwoWayNode."""

Node.$\_\_$init$\_\_($self$,$ data, next$)$

self.previous $=$ previous