This should be the top best practice

Wow! Didn't know this formula.
It's super fast compared to other solutions)

Thank you!

Yes, see it for yourself:

https://docs.python.org/2.7/library/functions.html#round

https://docs.python.org/3.5/library/functions.html#round

I think you meant, branchless

nice

This is constant time, fastest solution.

Agreed and also going in the high numbers - I had errors initially in my code that the test didn't catch.