The rap against "while True:" loops

Mensanator mensanator at aol.com
Sat Oct 10 17:20:35 EDT 2009


On Oct 10, 3:15�pm, kj <no.em... at please.post> wrote:
> I'm coaching a group of biologists on basic Python scripting. �One
> of my charges mentioned that he had come across the advice never
> to use loops beginning with "while True". �Of course, that's one
> way to start an infinite loop, but this seems hardly a sufficient
> reason to avoid the construct altogether, as long as one includes
> an exit that is always reached. �(Actually, come to think of it,
> there are many situations in which a bona fide infinite loops
> (typically within a try: block) is the required construct, e.g.
> when implementing an event loop.)
>
> I use "while True"-loops often, and intend to continue doing this
> "while True", but I'm curious to know: how widespread is the
> injunction against such loops? �Has it reached the status of "best
> practice"?

If you know this "exit that is always reached",
why do you pretend not to know it by writing
"while True"?

>
> TIA!
>
> kynn




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