The following are some good websites for programmers to brush questions:
LeetCode : LeetCode is an online algorithm and data structure practice platform, including a large number of programming questions and answer analysis. Besides Python, LeetCode also supports many other programming languages.
HackerRank : HackerRank is an online programming practice platform that can practice algorithms, data structures, mathematics, SQL, machine learning and other fields. Unlike LeetCode, HackerRank also includes some fun programming challenges and competitions.
CodeSignal : CodeSignal provides programming questions of varying difficulty that will not only help you improve your programming skills, but also help you find a job.
Codewars : Codewars is a community-driven programming training platform that provides a large number of programming challenges and practice questions. Unlike other programming practice platforms, Codewars allows users to write and share their own problems.
Project Euler : Project Euler is a website that provides math and computer science questions ranging in difficulty from beginner to advanced. If you are interested in mathematics, then Project Euler is a good choice.
Hope these sites can help you improve your programming skills!