I tested it out. Version without set() is much much slower than any other solution pasted here.

This should not be best practices.

Time of execution for long text of this version: 0.27908778190612793
time of exection for long text where you iterate over set: 0.0005300045013427734

@noweare

yes, it is one of the greatest features of this site

CPU go brrrrrrrr

great job.

my brain hurt bro,what is going on,wth man
ok i got it but i forgot the(start,stop,step) XD

This solution is very inefficient, being O(n^2), when it easily could have been made O(n)
Not every one-liner is clever or best practice.

@sztssp

Maybe perhaps it won't be for a larger data! (like an entire paragraph)!!! Would be a good experiment to test it!

man,really really thank you, i get it now.

because it refers to step. range(start, stop, step)

why you repeat x? can you explain pls, i don´t get it.

What is more performancy - list() or [for in]?

Could anyone explain why this is O(n2) instead of O(n) please?

Me too, i think i learn more by others solutions