When I learned OOP, every book used Dog, Cat, and Animal classes. I thought: "Classes must model real-world objects." Later, I saw code with classes like: › AuthenticationHandler › DataSerializer › CacheManager Eureka! Classes aren't just mirrors of reality—they're…
🎁 Weekly Python Giveaway! 10,000+ students learned Python with my course. This week, ONE person wins FREE lifetime access to the even better 2.0 version (€80 value)! ✨ What you get: › Code instantly in your browser (zero setup needed) › AI assistant when you're stuck ›…
Need to catch both IndexError and KeyError? Just use their parent — LookupError:
Calculating the same value inside a loop? Please, move it outside. Calculate once. Save energy. Be eco.
Just hit 1,000 followers—doubled in 20 days! 🎉 Thank you for valuing my content and engaging.
You're procrastinating on building because you think you need more knowledge. You don't. With just the fundamentals: › Variables & types › Loops & conditionals › Lists & dicts › Functions › File I/O › Basic classes You can build: › Web scrapers (collect data) › CLI…
I have never understood this fascination with cheat sheets. Whenever one posts a cheat sheet of anything, you get too excited. What do you need them for? Do you stick them on your walls for reference?😅 I mean, the whole internet is a cheat sheet. I will be more fascinated…
"We don't store your password" isn't marketing hype. It's true. Companies store password hashes, not passwords. How hashing works: › One-way only (can't reverse) › Same input = same output › Different input = different output They can verify your password but can't…
A to-do app can teach you more than you think. › Simple to-do (no storage) → fundamentals › With file saving → File I/O, data formats › To-do server → FastAPI, DB, REST APIs › CLI client → Client-server architecture One simple app. Four skill levels. Countless concepts.
I write posts, reply to quizzes, and built letpy.io because I love imagining someone having that "aha!" moment. I don't see those moments happen, but I hope they do. So honestly, I'm more excited about the creation process than the teaching itself.
Can't believe it. More than 100K views! Note for my X notebook — cats work well even in programming posts. 🐱
When I learned OOP, every book used Dog, Cat, and Animal classes. I thought: "Classes must model real-world objects." Later, I saw code with classes like: › AuthenticationHandler › DataSerializer › CacheManager Eureka! Classes aren't just mirrors of reality—they're…
Catching all exceptions is like taking painkillers without seeing a doctor. The pain vanishes, but you ignore your body's warnings. › Pain signals something is wrong (e.g., sitting on a hot stove). › Exceptions indicate broken code. Silencing them hides issues until…
I don't believe in "programmer brains." If you can make pasta (boil water, add pasta, wait 9 minutes, drain), you understand algorithms—a sequence of steps to achieve a goal. Programming is writing those steps in a language computers understand. Everyone starts confused.…
🎉 Giveaway Winner Announced! Congrats @fcbDavidBeloved — you've won FREE lifetime access to my updated letpy.io Python course! Check your DMs for your access link and code 🔐 Thanks to everyone who entered! Stay tuned for next week's giveaway
🎉 Weekly Python Giveaway! Win FREE lifetime access to my updated letpy.io course (€80 value)! 10K+ students completed the first version. Now it's even better. To enter: › Follow @kotov_dev › Like + Retweet › Reply "I'm in!" ⏰ Random winner from replies in…
Just hit 800 followers! I'm grateful to everyone who follows. Hope I'm bringing something useful to your programming journey. I doubled my following (400→800) in 25 days. Here's what I changed: Before: › 1 post/day › 5-10 lazy replies/day › Took 3 months to reach 400…
Async ≠ Parallelism Async is about waiting efficiently, not running simultaneously. Like a chef: while one dish is in the oven (waiting for API call), they prep the next (calculating formulas). Not two chefs. One chef, zero wasted time.
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