How to Fix: ValueError: not enough values to unpack (expected X, got Y)
This error happens when you use tuple unpacking (assigning multiple variables at once) but the number of variables on the left doesn’t match the number…
Python Automation Project: Build a ‘Focus Mode’ Website Blocker
This script redirects distracting websites to your computer’s “localhost” (a blank page), helping you focus. The Python Website Blocker is a simple tool designed to…
Working with Dates and Times in Python (datetime module)
If you’re not using Pandas, Python’s built-in datetime module is the standard way to handle dates and times. The Python datetime module offers essential functionality…
How to Fix: TypeError: ‘NoneType’ object is not subscriptable
This error is a close cousin to AttributeError: 'NoneType', In Python, the error message NoneType object is not subscriptable usually appears if you try to…
Machine Learning Project: Predicting House Prices with Scikit-Learn
In our Scikit-Learn intro, we used tiny fake data. Now we’ll use Python to predict house prices and build a real model. We’ll use a…
Web Scraping with Selenium: Handling JavaScript Sites and Waits
In our first Selenium guide, we used time.sleep(2). This is a bad, “brittle” way to wait. We’ll now look at how Selenium JavaScript Waits can…
Mutable vs. Immutable Objects in Python: Why It Matters
In Python, everything is an object. One of the most common concepts you’ll encounter is Mutable vs Immutable Python. But some objects can change (Mutable),…
Automating Excel with Python: Reading and Writing .xlsx Files (openpyxl)
Do you need to edit an Excel file but keep its style and formulas? While Pandas is good for checking data, it often ignores the…
Testing in Django: Writing Your First Unit Test
You’ve built a Django app. It works today, but will it work tomorrow after you change some code? If you want to understand the essentials…
How to Fix: IndexError: list assignment index out of range
This is a classic misunderstanding of how Python lists work compared to arrays in other languages. One common error is the IndexError list assignment issue,…
