Solving the NameError: name 'target' is not defined in Your LinkedList Implementation

Learn how to fix the `NameError` in your Python LinkedList implementation with clear examples and detailed explanations.
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Troubleshooting NameError in LinkedList Implementation

When programming, encountering errors is part of the journey. One common issue that many beginners run into is the NameError, specifically messages indicating that a variable is not defined. In this guide, we will explore a specific case where a NameError occurs while working with a LinkedList implementation in Python.

The Problem

While experimenting with a LinkedList class, a user received the following error message when trying to call the remove_node method:

[[See Video to Reveal this Text or Code Snippet]]

This issue typically arises from a simple mistake in referencing variable names correctly in your code. Let's first take a look at the code snippet that generated this error and understand how it is structured.

The Code Overview

The relevant parts of the LinkedList class (with the error), alongside the Node class, are as follows:

[[See Video to Reveal this Text or Code Snippet]]

The Solution

To fix the error and properly remove a node from the LinkedList, you'll need to make the following adjustments in the remove_node method. Here’s a corrected version of the method:

[[See Video to Reveal this Text or Code Snippet]]

Key Changes Made:

Putting It All Together

After making these corrections, you can use the LinkedList class to add and remove nodes correctly. Here's how you could test your modified LinkedList implementation:

[[See Video to Reveal this Text or Code Snippet]]

Conclusion

Debugging can be a challenging but rewarding process. In this case, recognizing incorrect variable references helped us resolve the NameError in the LinkedList implementation. With simple corrections, your code can function as intended, allowing you to continue learning and building more complex data structures in Python.

Now, get coding and fix that error! Happy programming!