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1. We don't really allow canonical question and answers. If you want to highlight something you can't whip up some example code and post a Q&A.

   Bit annoying, but it will prevent a wave of crap on the site.

   We were going to share common improvements on GitHub. But we've not got much there.

2. Explaining everything is long. And I don't think many people want to know why.

   I've stopped explaining why as much any more. And I've had maybe one comment asking why something does something. At which point I add to the answer the why.

   I may be writing some poorer answer due to this, however if you merge this with (1) you could just include a link to the information why.

I now write answers more like:

1. Follow PEP8.
2. Don't have bare excepts.
3. Use with when using open.

with open('file', 'w') as f:
    try:
        f.write(1 / int(input()))
    except ZeroDivisionError:
        print("Zero can't be the denominator of a fraction.")