Intermediate Project: Build a Real-Time Currency Converter CLI
We’re going to build a Command Line Interface (CLI) tool that can convert any amount of money between two currencies using live rates. This project…
Getting Data from the Web: Using APIs for Data Science (JSON to Pandas)
In our Pandas Guide, we loaded data from CSV files. But modern data often lives on the web, accessible via APIs. For data scientists, understanding…
How to Fix: ImportError: attempted relative import with no known parent package
One of the most confusing errors for Python beginners is the ImportError relative import crash. You organize your code into nice folders, add a simple…
Deploying Python: How to Put Your Flask/Django App on the Web (Render)
You’ve built a great Flask App or Django Project, but it only runs on your own computer (localhost:8000). So, how do you deploy your Python…
Stop Using Print: A Beginner’s Guide to Python Logging
When your code breaks, your first instinct is probably to add print("HERE!") or print(variable) to see what’s happening. This Python Logging Guide will help you…
How to Fix: TypeError: can only concatenate str (not “int”) to str
Python is strongly typed. It refuses to guess what you mean if you try to combine different data types, often leading to a TypeError can…
Beginner Python Project: Build a Text-Based Adventure Game
Before graphics, games were played entirely with text. You’d read a description and type what you wanted to do: “Go North”, “Take Sword”. Now, creating…
Python Lambda Functions: Anonymous Functions Explained
Sometimes you need a tiny function for just one quick task. Python Lambda Functions are perfect for these occasions. Writing a full def my_function(): block…
How to Fix: OSError: [Errno 22] Invalid argument (File Paths)
If you are coding on Windows, you have likely encountered the frustrating OSError [Errno 22] error when trying to read or write files. This error…
Intermediate Python Project: Build an Amazon Price Tracker
Following up on our Web Scraping 101, let’s build something useful: a Python Price Tracker script that checks a product price and tells us if…
![3D illustration of a file path blocked by illegal characters causing an OSError [Errno 22] Invalid Argument in Python.](https://pythonprohub.com/wp-content/uploads/2026/01/fix-oserror-errno-22-invalid-argument-file-paths-768x429.png)
