Re: [sage-devel] how to log sage output for long running program
On 16.03.19 05:46, Ai Bo 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 & I used something along PYTHONUNBUFFERED=whatever ../sage-8.6/sage test.sage > test.log & a couple of times. Daniel -- You received this message because you are subscribed to the Google Groups "sage-devel" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-devel+unsubscr...@googlegroups.com. To post to this group, send email to sage-devel@googlegroups.com. Visit this group at https://groups.google.com/group/sage-devel. For more options, visit https://groups.google.com/d/optout.
Re: [sage-devel] how to log sage output for long running program
> On Mar 16, 2019, at 02:33 , dimp...@gmail.com wrote:
>
> On Fri, Mar 15, 2019 at 10:21:48PM -0700, 'Justin C. Walker' via sage-devel
> wrote:
>>
>>> On Mar 15, 2019, at 21:46 , Ai Bo 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.
>
> I think he logs to f, so one would have to call f.flush() to flush the buffer.
Yep! Thanks for catching that.
--
Justin C. Walker
Director
Institute for the Enhancement of the Director's Income
--
Fame is fleeting, but obscurity
just drags on and on. F&E
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Re: [sage-devel] how to log sage output for long running program
On Fri, Mar 15, 2019 at 10:21:48PM -0700, 'Justin C. Walker' via sage-devel
wrote:
>
> > On Mar 15, 2019, at 21:46 , Ai Bo 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.
I think he logs to f, so one would have to call f.flush() to flush the buffer.
Dima
>
> 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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Re: [sage-devel] how to log sage output for long running program
> On Mar 15, 2019, at 21:46 , Ai Bo 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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[sage-devel] how to log sage output for long running program
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?
Thanks,
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