do ... while loop

[Gerrit Holl]

Tim Peters:
> [Joshua Marcus, fighting initial lack-of-feature bloat <wink>]
> > ...
> > There are, in fact, other situations in which one actually wants a
> > "do...while" loop & one is forced to either repeat code or make a
> > meaningless initial assignment.
> 
> Those are never necessary, although it's amazing how often people fall into
> believing they are.  The usual Python idiom for:
> 
>     do {
>         xxx;
>         yyy;
>     } while (condition);
> 
> is simply:
> 
>     while 1:
>         xxx
>         yyy
>         if not condition:
>             break

Huh?
Why don't use the following code:

while condition:
    xxx
    yyy

I don't understand the difference.

> 
> The criminally insane sometimes write the last line instead as:
> 
>         if not condition: break
> 
> but putting it on separate lines (as God intended) is key to making the
> idiom instantly (after you're used to it -- about two days) recognizable for
> what it is.

I'll change my code. As far as I remember, this isn't mentioned in Guido's
style guide; am I right?

regards,
Gerrit.
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