Sergei Kotov | Python Made Simple
@kotov_dev
Full-stack dev & course author. 10K+ paid students. Simplifying Python concepts, learning discipline & motivation.
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…
In Python, variables are references to objects. There is no "pass by reference" vs. "pass by value" like in other languages—you're always passing references.
Want to learn programming? Forget motivation. Build a ritual. Code every single day. Consistency beats inspiration every time.
Don't convert iterators to lists just for slicing. Use islice from itertools instead. Same result, fraction of the memory cost:
When debugging, be a sniffer dog—focus narrowly, follow the scent. When designing software, be a general—think broadly, plan strategically.
Worried a big company will steal your idea? Reality check: › They need to notice you first › You need to be profitable enough to matter › If you succeed, they'll probably try to buy you, not crush you Don't let fear stop you from starting. Hollywood has infinite money and…
Early programming memory: Spent weeks figuring out how to make two stars move toward each other. When the loop finally worked, the feeling was irreplaceable. Nothing beats the pleasure of understanding.
You can't afford panic when prod is down. You wouldn't want a surgeon who panics during surgery. Be the calm one. Debug methodically. Panic only makes it worse.
After countless hours of debugging, I've learned one truth: In 100% of cases, the human is guilty, not the computer.
I've learned countless times that pencil and paper are the best debugging and problem-solving tools. Well, at least a pencil.
Good code often looks too simple and straightforward. But that's the point — write good code, not clever code.
1,100 followers today! Thank you for following, commenting, and engaging.
I wish I had as much patience and enthusiasm for marketing as I've had for learning programming.
Dear Python beginners, If someone tells you to create static classes for functions — ignore them. That's not Pythonic. Use modules instead — write functions directly in files without class wrappers. Use classes only when combining state and behavior. Otherwise, keep it simple…
Just in case: the assignment operator doesn't create objects; it assigns names to objects. Objects are created on the right side, names on the left.
AGI is impossible (or at least decades away). That’s why we see those AI-browsers and n8n clones.
With AI, no-code trash becomes code trash. Still messy, still hard to maintain—now with more lines of code.
I'm considering launching free email newsletter featuring Python mini-courses: › Files & data formats › APIs & internet fundamentals › Other concise, practical topics 1-2 emails/week, ±10 letters per topic. Would you subscribe?
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