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As a developer, while working on a data-cleaning project, I needed to compare two lists of customer IDs. One list came from our sales system, and the other from our support system. The challenge was simple: I needed to find which IDs were missing in one list but present in the other. At first, I … Read more >>
Recently, I was working on a project where I needed to save user data from a Python dictionary into a text file. At first, I thought this would be easy, but then I realized there are multiple ways to do it, depending on the format I wanted. Over the past 10+ years of coding in … Read more >>
While working on a project where I had to send structured data from a Python backend to a web application. The data was stored in a nested dictionary, and I needed to convert it into JSON format. The issue is… while converting a simple dictionary to JSON is easy, many people get confused when the … Read more >>
I was working on a file management project, and I needed to quickly grab the current folder name where my Python script was running. At first, I thought it would be a one-line solution, but then I realized there are multiple ways to do this, depending on whether you want the full path or just … Read more >>
As a developer, I was working on a data-cleaning project where I had to process a large JSON dataset from an API. The dataset represented customer information, but many records contained empty keys that served no purpose. If you’ve ever worked with dictionaries in Python, you know they’re one of the most powerful data structures. … Read more >>
Recently, I was working on a data-cleaning project where I had to verify if a smaller list of values existed inside a larger dataset. At first, I thought Python might have a direct built-in method for this. But just like in Excel, where you don’t always get a direct option (for example, filtering strikethrough text), … Read more >>
When I first started coding in Python more than a decade ago, I often wondered why there wasn’t a built-in increment (++) or decrement (–) operator like in C or Java. If you’re new to Python, this can feel confusing at first. But don’t worry: Python makes this process simple and flexible with its own … Read more >>
I was working with a team of data analysts in New York. We were optimizing some Python functions that handled large datasets. During the review, one of the junior developers asked me: “Does Python use call by value or call by reference?” This is a common question. I’ve been coding in Python for more than … Read more >>
Recently, I was working on a small project where I needed to check if a number was a perfect number. At first, I thought Python might have a built-in function for this. But just like Excel doesn’t have a direct way to filter strikethrough cells, Python doesn’t come with a ready-made tool for perfect numbers. … Read more >>
When I first started teaching Python to beginners, one of the most common questions I got was: How do I calculate the area of a rectangle It’s a simple problem, but it’s also one of the best ways to understand how Python handles inputs, variables, and basic arithmetic. In this tutorial, I’ll show you step … Read more >>
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