yuusvision.hashnode.devWhy Environment Variables Exist (.env Files Explained)Level 0: Basics Before we talk about hacking and security, let’s look at the name itself: Environment Variable. You already know what a variable is. In Python, you say x = 10. The code knows that x holds the value 10. But what is the Environment? The...Dec 26, 2025·3 min read
yuusvision.hashnode.devHow Dependency Conflicts Break Group Projects 💥The Horror Story You send your code to your teammate. They run it. Error: ModuleNotFoundError: No module named ‘Pandas’ They panic and install Pandas. They rerun it. They installed a different Pandas version. The method you used no longer exists, or ...Dec 18, 2025·3 min read
yuusvision.hashnode.devWhy “It Works on My Laptop” Is a Real Engineering Problem“It works on my Laptop” is not a joke. It is a symptom of poor engineering practices and costs time, money, and trust. Imagine this: it's 2.00 AM before a final group project submission. You have been coding on Windows, and your teammate is on a Mac....Dec 16, 2025·4 min read
yuusvision.hashnode.devLearn Web Scraping with Python: Build Your Own Datasets from ScratchThe Problem As a data science student, I often hit a wall: I have a question, but I don’t have the data. In most practicals and tutorials, we are usually given clean .csv files, like the famous iris.csv or titanic.csv datasets. But in the real world,...Dec 5, 2025·6 min read