> On Mar 15, 2019, at 21:46 , Ai Bo <boaisp...@gmail.com> wrote:
>
> I am running a long running program. I would like to log the output.
> I have tried:
> ../sage-8.6/sage test.sage > test.log &
>
> There is nothing written in test.log before the program finishes.
> I tried to use tee, same problem.
>
> I tried to add:
> f = open('test.log', 'w')
>
> in my test.sage program, still nothing is written before the program finishes.
>
> How to log a long running program?
The problem, I think, is that python uses buffered output. I assume that you
are using print statements, so (without knowing more), I would use
sys.stdout.flush()
after each print, or after points in your program where the state is useful for
debugging.
If I’ve made the wrong assumptions, let us know.
HTH
Justin
--
Justin C. Walker
Curmudgeon at Large
Director
Institute for the Enhancement of the Director's Income
--
Build a man a fire and he'll be warm
for a night.
Set a man on fire and he'll be warm
for the rest of his life.
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