do while loop

[Rick Zantow]

Marc 'BlackJack' Rintsch <bj_666 at gmx.net> wrote in 
news:pan.2006.04.26.20.41.03.189115 at gmx.net:

> In <1146012542.166096.78690 at g10g2000cwb.googlegroups.com>, é›· wrote:
> 
>> suggest  add do while loop in later version
> 
> Please also suggest a clean syntax for this.  :-)
> 

Since Python already has a while <condition>: loop, I'm supposing you 
mean something like 
    	do:
    	    	<some code>
    	while <not condition>
or
    	do:
    	    	<some code>
    	until <condition>

Is that what you mean? In some languages that might be a "do x until y" 
loop,  which I would suppose has been proposed before for Python. A 
clean syntax might be 

    	until <condition>:
    	    	<some code>

... except that people seem to object to placing the condition 
specification so far from where the test would actually take place (at 
the bottom of the loop). I don't have a problem with that, but I can see 
why many would. It doesn't seem Pythonic somehow. 

There was a long thread about a loop-and-a-half construction where some 
of this was discussed, though I don't have a link for that. 

In any case, what would you want to do that you can't do (in some way) 
now? If you have a compelling use case, you could get a bit more 
attention than merely offering a suggested expansion of the language.

-- 
rzed