oop python leetcode example

Where can I find problems to practice OOP?

reddit.com › r › learnpython › comments › ih78ba › where_can_i_find_problems_to_practice_oop

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

LeetCode

leetcode.com › problems › maximum-product-of-word-lengths › solutions › 2087057 › easy-to-understand-oop-solution-in-python

Maximum Product of Word Lengths - LeetCode

Maximum Product of Word Lengths ... letters. If no such two words exist, return 0. Example 1: Input: words = ["abcw","baz","foo","bar","xtfn","abcdef"] Output: 16 Explanation: The two words can be "abcw", "xtfn"....

reddit.com › r/learnpython › where can i find problems to practice oop?

r/learnpython on Reddit: Where can I find problems to practice OOP?

August 26, 2020 -

Here's what I have tried so far: Codewars - The problems labelled classes were either too complex to understand for me, or I found no actual need for implementing OOPS. None of the problems required you to create a class anyways.

Hackerrank - Just two problems in the OOP/ classes section ( don't remember what they exactly call them) and they two were hard math problems, so I need to first of all understand the complex maths concepts before I can get to programming.

Leetcode - Can't actually filter out problems based on OOP.

Top answer

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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.

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Congrats! You now know enough to be dangerous. As others have suggested: search for beginner python projects if you're not yet sure what you want to create. Another general suggestion that I wish someone had given to me after I could grok the basics of OOP is: start becoming familiar with OOP 'design patterns'. There's lots of examples for basic patterns (lookup factory, builder or facade patterns). Sometimes you will find examples that include actual code and other times you may find conceptual descriptions that accompany UML diagrams for a toy example. refactoring.guru has a nicely organized site to browse around. The site map provides a nice orientation to design patterns in general and in the Code Examples section in the sidebar, you can find python-specific implementations . IMO, learning about how different things may be constructed out of OOP concepts will be hugely helpful for developing proficiency. When starting out with OOP, it's tempting to shove everything into a class without thinking about it too much -- and most of the stuff you encounter when starting out is simple enough that there's typically no dire consequences that challenge you to re-think your design. But there's a lot of clever ways to construct classes to accomplish goals and being able to recognize them will pay huge dividends in the future. Other suggestions: get comfortable with debuggers and breakpoints if you're not already familiar. It will make it so much easier to step through issues when you don't have to print("everything") just to inspect state. Lastly, look up "TDD" if you're not already familiar with the idea of writing tests. I'm not suggesting that you become too preoccupied with writing tests right away but once you begin to create more complicated projects, you may appreciate why "debugging sucks; testing rocks." TLDR: I wish that I had a larger vocabulary/proficiency for design patterns when starting out. You won't immediately need to know how to write tests or implement design patterns but becoming familiar with these ideas and embracing them early on will help you immensely down the road.

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