Am Mittwoch, den 01.11.2006, 22:16 -0800 schrieb Dick Moores: > At 03:56 PM 11/1/2006, Andreas Kostyrka wrote: > >Am Mittwoch, den 01.11.2006, 15:43 -0800 schrieb Dick Moores: > > > At 12:14 AM 10/31/2006, Alan Gauld wrote: > > > > > > >"Dick Moores" <[EMAIL PROTECTED]> wrote > > > > > I'd like to know how to use sys.exit() to quit a program. > > > > > > > > > > > > >I see that you already figured that out. > > > >You can also quit by raising SystemExit, which is > > > >what sys.exit does... but you don't need to import sys... > > > > > > I'm afraid I don't know what you mean. How do I raise SystemExit, and > > > why don't I need to import sys? > > > >raise SystemExit(2) > > > >is equal to sys.exit(2) (actually sys.exit(2) just raises SystemExit(2)) > > OK, that works well. But why the 2?
2 is the usual error code for invalid cmdline parameters in the Unix
world. Just an example here.
>
> BTW at the command line, "raise SystemExit(2)" produces a completely
> silent exit. In Win IDE I get "SystemExit: 2". With IDLE:
>
> Traceback (most recent call last):
> File "E:\Python25\dev\1unitConversion5a.py", line 425, in <module>
> main()
> File "E:\Python25\dev\1unitConversion5a.py", line 413, in main
> s = formatAndCheckStringFromUser(s)
> File "E:\Python25\dev\1unitConversion5a.py", line 342, in
> formatAndCheckStringFromUser
> s = stripResponseAndCheckForUserRequestForHelpOrToQuit(s)
> File "E:\Python25\dev\1unitConversion5a.py", line 253, in
> stripResponseAndCheckForUserRequestForHelpOrToQuit
> raise SystemExit(2)
> SystemExit: 2
>
> If I can manage to use "break", all 3 exits are silent. Why is it
> wrong to use "break" to exit?
Because it does not:
for i in xrange(50):
for j in xrange(50, 100):
if j == 77:
break
will not stop the program when it hits the break.
But yes, there are no reason why you should not let your script just
end.
Andreas
>
> Dick Moores
>
> Dick Moores
>
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