do ... while loop

[Martin Pool]

Cliff Crawford wrote:
> I always liked BEGIN...WHILE...REPEAT in Forth.  I guess the Python version
> would look like:
> 
>   begin:
>     x=f.readline()
>   while x:
>     print x
> 
> The point being, you check the condition in the middle of the loop, instead
> of at the beginning or the end.

At least the structure of 

  while 1:
    x = f.readline()
    if not x: break
    print x

is the same.  So it's really just a matter of whether we want a larger,
more specific syntax, or a smaller syntax that relies a little more on
people using idioms.

--
Martin

"Don't confuse excellence, which is achievable, with perfection, which
is elusive." -- Anon