Re: Why does bufsize=1 not work in subprocess.Popen ?

Marc 'BlackJack' Rintsch wrote:
> In <V6R4g.89900$P01.79112@pd7tw3no>, I. Myself wrote:
>
>
>> I read in the docs that "bufsize=1" causes line buffering. (for
>> subprocess.Popen)
>>
>> The following tiny program launches an executable file and then receives
>> its output. That works, but I want to
>> receive each line as it is ouput, not all of the lines at termination,
>> which is what is happening.
>>
>
> From the Python side you can only control Python's input buffer but not
> the output buffer of the external program you are starting. I guess that
> programs buffers its output.
>
> Ciao,
> Marc 'BlackJack' Rintsch
>
That makes sense. I remember now that someone told me that Windows
sends line-by-line only to the screen. To a pipe it sends buffers full.

Thanks,

Mitchell Timin

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