I know it's not really what you're looking for be it's my opinion: projects. You should practice using something in a situation where it is relevant. OOP shines best in complicated programs with a certain complexity/intricacy, or to simplify the code you're writing. Exercises don't help practice that because they tend to be short. In python, you'll almost never have to write over 50 lines for a simple exercise. Let alone 200, and that's about the length where turning to OOP starts being advantageous. So find yourself a project. It doesn't even have to be explicitly object oriented: a game, a simulation, things with entities in general beg for OOP, but it can be used anywhere. On this sub, I once proposed a implementation of rock-paper-scissors using a class. The point is to make something, and at some point to use OOP to simplify it. This may be at the very start, or later, when you find that your code is very copy pasty and you use classes to reduce that. You may even revisit an older project and try to rewrite it with OOP, maybe expand upon it. The important thing is to dive into something and get working on it. It may be 150 lines or 700. The point is you'll only be able to do it if you know OOP: if it feels easy and intuitive, then you're good, otherwise, keep going. That will get you the practice you want: a real application of the concepts you learn. Answer from themateo713 on reddit.com