Tips on Romi's Dev Journey

How the Luhn Algorithm Saved Me from Card Number Typos in Python

Sun, 24 Aug 2025 00:00:00 +0000

Working at a bank, I deal with card numbers every day. I used to just trust that users (or even myself!) would enter the right numbers before sending them off to our APIs. But after a few embarrassing errors and wasted API calls, I discovered a simple trick that changed my workflow: the Luhn algorithm.

Let me share how this little-known tool saved me time, reduced errors, and made my Python scripts automation smarter!

How I Stopped Hardcoding Values in Python Scripts Using Enums

Sat, 05 Jul 2025 00:00:00 +0000

As someone who writes Python scripts to automate daily tasks, I’m always searching for ways to make my code more reliable and readable. Recently, I discovered a tool that’s been a total game-changer for my scripts: Python Enums.

Let me share how using Enums helped me avoid silly bugs, made my code easier to understand, and can do the same for you!

The Problem: Magic Strings and Numbers Everywhere

When I first started automating tasks, I often used plain strings or numbers to represent options or states. For example:

How Guarded Clauses Made My Python Scripts Cleaner

Fri, 27 Jun 2025 00:00:00 +0000

As someone who writes Python scripts to automate daily tasks, I’m always looking for ways to make my code simpler and easier to read. Recently, I stumbled upon a concept that completely changed how I structure my functions: guarded clauses (also known as early returns).

Let me share how this small shift made my scripts much cleaner—and why you might want to try it too.

The Problem with Nested If-Else Blocks

When I first started scripting, my functions often looked like this:

Using Keyword-Only Arguments for Clarity in Python

Fri, 20 Jun 2025 00:00:00 +0000

As a beginner in programming, I often write Python scripts to automate daily manual tasks. Early on, I struggled with confusing function arguments—especially when they were all similar types. After reading some documentation and making a few mistakes, I discovered keyword-only arguments. This simple feature made my code much clearer and easier to use, so I want to share it with fellow beginners.

What Are Keyword-Only Arguments?

In Python, you can force some function arguments to be specified by name (as keywords) rather than by position. This is done by adding a * in the function definition before those arguments:

Why I Switched to Pathlib for Python Path Operations

Sun, 15 Jun 2025 00:00:00 +0000

Why I Switched to Pathlib for Python Path Operations

As a fellow newbie in the programming world, I often find myself writing Python scripts to automate my daily manual tasks. One thing that always felt a bit clunky was dealing with file paths using os.path.join. Recently, I discovered pathlib, and it made my code much more intuitive and readable. I want to share my experience in case it helps other beginners!