Practice Probs

What it does

Practice Probs supplements boring programing documentation with fun practice problems and solutions. As of writing, we offer programming challenges for Python libraries like NumPy, Pandas, Matplotlib, PyTorch, pytest, and scipy.

Fun programming practice problems to help you learn including numpy, pandas, matplotlib, pytorch, pytest, regular expressions, sparse matrices, bigquery, selenium, git, and more! All problems include explained solutions. Tons of free content, including tutorials, guides, and of course - practice problems.

• PT
  Python-Type-Challenges, master Python typing with online exercises2023 · python-type-challenges.zeabur.app · ▲110

  Hi HN, I'm excited to share Python-Type-Challenges, a collection of hands-on, interactive challenges designed to help Python developers master type annotations. Whether you're new to type hints or looking to deepen your understanding, these exercises provide a fun and educational way to explore Python's type system. I'd love to get your feedback and contributions! https://github.com/laike9m/Python-Type-Challenges

• PC
  PyBites Code Challenges2017 · pybit.es · ▲63

  With Pybites you'll beat imposter syndrome, stop tutorial paralysis, and build real world apps using Python. It's tried, proven and pytested.

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  Python Challenges2025 · pythonexercise.com · ▲7

  I made pythonexercise.com as a simple way to practice Python with short exercises you can solve right in the browser. It's still a work in progress, I’d love feedback on what to improve or add. Thanks!

• PP
  Practice Python Projects eBook for beginners2021 · learnbyexample.github.io · ▲27
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  Practices of the Python Pro2019 · thepythonpro.com · ▲14

  Learn to design professional, maintainable software at scale

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  Weekly Python Exercise2017 · weeklypythonexercise.com · ▲19

  Python courses covering comprehensions, generators, decorators, iterators, descriptors, and pandas — from data structures to advanced object-oriented design.

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  SimCity, but with Permits▲939

  A free city-building game in your browser. You are the mayor. You know what the city needs. Now get it past the zoning board, the neighbors, the appeals court and the next election.

  Life & fun · 7d ago · permit.petercai.com

• IV
  I've been paying for a rural Tanzanian's education for 10 years▲778

  Life & fun · 19d ago · tanzaniaeducationproject.org

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  Bigwords.page – Turn any screen into a sign. The URL is the app▲728

  Turn a phone, tablet or TV into a sign. Type a message and it fills the screen: welcome signs, timers, Wi-Fi passwords and more. No app, no account, free.

  Life & fun · 20d ago · bigwords.page

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  Steal My Bitcoin▲616

  A PHP security challenge. Find the hidden bitcoin key. First person to get the wallet wins.

  Life & fun · 3d ago · stealmybitcoin.com

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  Guitoro, a virtual guitar you strum with your keyboard▲573

  Play a free virtual guitar online with your keyboard or by touch. Slow songs down and see every chord, string and strum. Acoustic, classic, electric and bass.

  Life & fun · 14d ago · guitoro.com

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  Product Hunt Visual Launch Editor▲443

  See your launch as you build it

  Life & fun · 4d ago

• IM
  I made a web game called Almost Pong▲1,135

  Hi HN! I made many small web games in the past with Unity or Phaser. But this time I wanted to make something completely on my own. So I coded a basic game framework in plain JavaScript, and used it to make Almost Pong. This was a really fun project that taught me a lot about JavaScript, and I plan to make more minimalist games with this framework. Interesting fact: Almost Pong doesn't load any assets, all sprites and sounds are generated with code. Happy to answer questions, and please let me know if you have any feedback on the game. Thanks!

  Dev tools · 2022 · lessmilk.com

• IM
  I'm writing a free book called Computer Networks from Scratch▲792

  Life & fun · 2022 · networksfromscratch.com

• HA
  HN Avatars in 357 bytes▲701

  Paste the following into the console of any HN page - for annotated avatars on all HN comments. (self contained code) for(u of document.querySelectorAll('.hnuser'))for(u.prepend(c=document.createElement('canvas')),x=c.getContext('2d'),c.width=18,c.height=14,s=u.innerText,r=1,i=28+s.length;i--;i>>29>X*X/3+Y/2&&x.fillRect(6+2*X,2*Y,2,2)&x.fillRect(6-2*X,2*Y,2,2):r+=s.charCodeAt(i-28,x.fillStyle='#'+(r>>8&0xFFFFFF).toString(16)))r^=r>>17,r^=r>2

  Dev tools · 2022

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  Tome Beta▲697

  The storytelling tool for work

  Work · 2022 · tome.app

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  Kairn▲694

  Regain control over your days

  Dev tools · 2022

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  A game that tests how well you know your local area▲654

  How well do you know your area? Test your knowledge by locating streets on a map.

  Work · 2022 · backofyourhand.com