Show HN: An educational blockchain implementation in Python
> It is NOT secure neither a real blockchain and you should NOT use this for anything else than educational purposes.<p>It would be nice if non-secure parts of implementation or design were clearly marked.<p>What's the point of education article, if bad examples aren't clearly marked as bad? If MD5 usage is the only issue, author could easily replace it with SHA and get rid of the warning at the start. If there are other issues, how can a reader know which parts to trust?<p>Even if fixing bad/insecure parts are "left as an exercise for the reader", learning value of the article would be much greater if those parts would be at least pointed at.