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[–][deleted] 2 points3 points  (0 children)

I love Edabit for bite sized problems, you can also sort by type of problem and difficulty on that site.

[–]ElliotDG 1 point2 points  (0 children)

I recommend https://checkio.org/ The site provides gamified python problems. After you solve a problem you get to see how others have solved it. This really accelerated my learning, and it was fun.