Debugging Basics in Python: Encountering and Fixing Bugs

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The world of programming is rarely a smooth ride. Even seasoned developers run into roadblocks caused by bugs (errors) in their code. These errors can lead to unexpected behavior or crashes, hindering the program’s functionality. This article serves as your guide to understanding and fixing bugs in Python.

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Conquering Bugs in Python: Your Debugging Guide

Have you ever written some Python code, only to have it crash or produce unexpected results? Well, congratulations! You’ve just encountered your first bug. Bugs, also known as errors, are simply imperfections in your code that prevent it from working as intended. But fear not, brave programmer! This guide will equip you with the knowledge and tools to vanquish these pesky bugs and write robust Python code.

What are Bugs and Why are They So Common?

Bugs can be typos, syntax errors (like missing parentheses), or logical mistakes in your code. Programmers, even experienced ones, spend a significant amount of time (around 20-40%) hunting down and fixing these bugs. It’s a normal part of the development process!

Understanding Your Enemy: Reading Error Messages

Your first weapon in the bug-battling arsenal is the error message. When your code encounters a bug, Python throws an error message that points to the line of code with the issue and often provides clues about the nature of the problem. Learning to read and understand these messages is crucial for effective debugging.

Example Bug: The Missing Parenthesis

Let’s take a look at a simple example:


print(“Hello”  # This line contains a bug

This code snippet has a bug because it’s missing a closing parenthesis for the print() function. Running this code will result in an error message similar to:

File “/Users/as/”, line 1



SyntaxError: ‘(‘ was never closed

The error message tells us two important things:

  1. There’s a syntax error on line 1 (the line with print(“Hello”)).
  2. A parenthesis is missing and needs to be closed.

Fixing the Bug

By understanding the error message, we can easily fix the bug by simply adding the missing parenthesis:



Now, running the code should produce the expected output:


Key Points to Remember:

  • Error messages are your friends! Read them carefully to identify the location and nature of the bug.
  • Take your time. Don’t get discouraged if you don’t understand the error message right away.
  • Fixing bugs is an essential part of writing good code.

Summary Table: Debugging Basics in Python

BugsErrors or imperfections in code that prevent it from functioning as intended.
Error MessagesMessages from Python that point to the location and nature of a bug.
Key Points– Read error messages carefully. <br> – Don’t rush; take time to understand the error. <br> – Fixing bugs is essential for good code.
Debugging Tips– Read error messages carefully. <br> – Experiment with fixes. <br> – Test code after each modification. <br> – Practice! The more you debug, the better you’ll become.

Upgrading Your Skills: Practical Debugging Exercises

Now that you’ve grasped the basics of error messages, you’re ready to put your newfound debugging skills to the test with some practice exercises! (See the original source for these exercises). These exercises will help you identify and fix common bugs in Python code.


Debugging is an iterative process. Read error messages carefully, experiment with fixes, and test your code after each modification. The more you practice, the better you’ll become at identifying and resolving bugs in your Python code.

This is just the beginning of your debugging journey in Python. As you delve deeper into programming, you’ll encounter more complex bugs. But with the foundation you’ve built here, you’ll be well-equipped to tackle them with confidence!

This article equips you with the foundational skills to tackle bugs and become a debugging pro. Remember, debugging is an iterative process that involves careful reading of error messages, experimentation with fixes, and thorough testing after each modification.

The more you encounter and conquer bugs, the more adept you’ll become at identifying and resolving them. This is just the first step in your debugging journey. As you explore programming further, you’ll encounter more intricate bugs. But with the knowledge you’ve gained here, you’ll be well-prepared to face them head-on!

Hi! I'm Sugashini Yogesh, an aspiring Technical Content Writer. *I'm passionate about making complex tech understandable.* Whether it's web apps, mobile development, or the world of DevOps, I love turning technical jargon into clear and concise instructions. *I'm a quick learner with a knack for picking up new technologies.* In my free time, I enjoy building small applications using the latest JavaScript libraries. My background in blogging has honed my writing and research skills. *Let's chat about the exciting world of tech!* I'm eager to learn and contribute to clear, user-friendly content.

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