How to replace space in a string with \n

[Terry Reedy]

On 1/31/2019 11:19 AM, Ian Clark wrote:
> text = "The best day of my life!"
> output = ''
> 
> for i in text:
>   if i == ' ':
>    output +='\n'
>   else:
>    output += i
> 
> print(output)
> 
> throwing my hat in the ring, not only is it .replace free it is entirely
> method free

But this is an awful, O(n*n) way to solve an inherently O(n) problem, 
which I think should not be taught to beginners unless they are 
simultaneously taught to never do this for indefinitely large n.

-- 
Terry Jan Reedy