Articles

What you're building
The shopping list is back. Again.
Version 1 used a list. Version 2 added quantity and price with a dict.
Version 3 adds persistence. The list saves to a fi…

You've covered file handling from every angle. Here are the mistakes that show up most often — and how to fix them.
1. Not closing the file — or forgetting with open(…

You've covered file handling from every angle. Before moving on, here's everything in one place.
// The pattern — always
with open("file.txt", "r", encoding="utf-8") as f:…

Stop for a second.
Look at what's in your kit now.
Lists that grow, shrink, sort, and remember. Dicts that give you any value by name — instantly. Tuples that hold fixed d…