Python problem: "Write a Node class for singly linked structure.    Define 3 node objects with which to put these data in them. "4", "-7", "34" "   Here is the node code: """ File: node.py   Node classes for one-way linked structures and two-way linked structures. """   class Node(object):       def __init__(self, data, next = None):         """Instantiates a Node with default next of None"""         self.data = data         self.next = next   class TwoWayNode(Node):       def __init__(self, data, previous = None, next = None):         Node.__init__(self, data, next)         self.previous = previous   # Just an empty link node1 = None   # A node containing data and an empty link node2 = Node("A", None)   # A node containing data and a link to node2 node3 = Node("B", node2)

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
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Python problem:

"Write a Node class for singly linked structure. 

 

Define 3 node objects with which to put these data in them. "4", "-7", "34" "

 

Here is the node code:

"""

File: node.py

 

Node classes for one-way linked structures and two-way

linked structures.

"""

 

class Node(object):

 

    def __init__(self, data, next = None):

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

        self.data = data

        self.next = next

 

class TwoWayNode(Node):

 

    def __init__(self, data, previous = None, next = None):

        Node.__init__(self, data, next)

        self.previous = previous

 

# Just an empty link

node1 = None

 

# A node containing data and an empty link

node2 = Node("A", None)

 

# A node containing data and a link to node2

node3 = Node("B", node2)

 

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