Node

Overview

The Node class is an abstract base class used in the creation of a file tree in the automata.navigation.directory module. Each node can represent a file or a directory within this file tree. It is primarily used in the construction of trees for file or directory navigation within the Automata project. Each instance of the Node class represents a node of the tree and has attributes name and parent corresponding to the name of the node and its parent node respectively.

Example

The Node class is an abstract class, hence there can’t be an instantiation of it. However, it serves as a base class for its subclasses like File and Directory. In the example below, a File object is created.

from automata.navigation.directory import File

file = File("sample_file", None)

Note: In the above example, sample_file is the name of the file and None represents that the file has no parent node.

Limitations

Since Node is an abstract base class, it can’t be instantiated on its own. It doesn’t contain any method to manipulate its attributes name and parent, hence, these should be handled carefully in the subclasses.

Follow-up Questions

  • Are additional methods required in the Node class to manipulate its attributes i.e., name or parent?

  • Given Node is an abstract base class, what are the contract details, i.e., the methods subclasses are expected to implement?