index and num

holy crap - how did I miss out on this lol

Okay, but why 'best practice'?

The most important thing here is the list comprehension (sum(int(x)) for x in str(value)

It is nothing but a for loop, you will write hundreds of for loops until it just clicks that what you're trying to do is this essential form, and then it comes naturally.

the more you see it the more obvious it gets

bro went all the way to docs bro future bright

This reply might make sense if you used modulo extraction to do it completely mathematically, but you used a method that is still O(n) in space complexity so the difference between your code and the given solution is barely different.

I am still new to python but I wonder how does someone think about these one liner clean code, does it come after few iterations or they pop up just like that :)

Personnaly I do it because it is fun to do. It also test my knowledge of a language and allow me to improve on this language.

However, I avoid to do those kind of thing for professional code and always favor readable and easily understable code.

Codewars is not real life project guys, it is fun to have those kind of solution upvoted, it show of what a language can do and help reader to improve, even if it should not be applied in a professional context !

This is cool I didn't know you could do that.

SyntaxError: assignment expression cannot be used in a comprehension iterable expression

Yeah but... This is just a simple one-liner. So it's still pretty readable, for me at least

It's not THAT bad at the end of the day 😅

You can avoid this now with the walrus operator

This is like what I did, but in one line.