No Do while/repeat until looping construct in python?

[Andy Freeman]

"Greg Ewing (using news.cis.dfn.de)" <me at privacy.net> wrote in message news:<b4rkcq$22tehe$1 at ID-169208.news.dfncis.de>...
> Alex Martelli wrote:
> > Yes.  Having a single loop construct as Knuth suggested many decades
> > ago, e.g.:
> > 
> >     repeat:
> >         <pre-code>
> >     while <test>:
> >         <post-code>

> And this is *such* a common looping pattern that I really
> don't understand why *no* language I can remember seeing
> has explicit support for it.

Common Lisp's "loop" construct does.

> I think it's a somewhat bigger deal than you make out,
> since it would bring the exit condition into a prominently
> visible place, instead of being buried and easy to miss
> at first glance.

In most not-Python languages, it's possible to get most of
that prominence by outdenting the "if <test> break;".

While I'm very sympathetic with the prominence argument, I've
never seen anyone outdent "middle breaks".  I won't do it
because said outdenting makes indentation less useful as a
structural clue; it forces readers to recognize keywords
instead of just looking at shape.