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Python Performance: Why 'if not list' is 2x Faster Than Using len()
(blog.codingconfessions.com)
This is a most excellent place for technology news and articles.
Comments shouldn't explain code. Code should explain code by being readable.
Comments are for whys. Why is the code doing the things it's doing. Why is the code doing this strange thing here. Why does a thing need to be in this order. Why do I need to store this value here.
Stuff like that.