Getting all of them can be very expensive for large arrays with small n.

Which means I'm NOT lazy! I knew it this whole time!

Because most people are lazy ;-)

too much code golf and less BP

not many started from the end of the list. strange.

Thanks for wise advice

Because I'm lazy

Then why are you using the same solution?

It was created in python 2, where the output of range() is a list.

In python 3, you need to transform it into a list.

This does not work it just outputs range(1,5) and not 1,2,3,4,5

How would you overcome that?

Returning boolean value inside a conditional flow(if-else statement) can be simplified to a straight return.

Not really best practice, because you traverse the whole list, although in most cases it's not needed.