Re: [Python-ideas] Immemorial desire for "do-while"-like construction

15 Jul 2009

      Chris Rebert wrote:
...
On Wed, Jul 15, 2009 at 3:50 PM, Jan Kaliszewski wrote:
...
Hello,
The issue has been coming back repeatedly:
How we could elegantly and pythonic'ly avoid repeating ourselves if
we need the control flow structure that e.g. in PASCAL has the form:
repeat
...
until CONDITION
In Python we must use while-loop in not very DRY (Don't Repeat
Yourself) manner:
SOME
ACTIONS
HERE
...
while CONDITION:
     THE SAME
     ACTIONS
     AGAIN
     ...
You can fix that by just writing it as:
while True:
    SOME
    ACTIONS
    HERE
    if not CONDITION: break
If we were going to add 'repeat' then it could be:

     repeat:
         SOME
         ACTIONS
         HERE
     while CONDITION

If 'while' starts a loop it ends with a colon and the body of the loop
follows either on the same line or indented on the next lines. If
'while' ends a 'repeat' loop it doesn't end with a colon and there isn't
anything following on the same line or indented on the next lines.

Re: [Python-ideas] Immemorial desire for "do-while"-like construction

MRAB