How to determine if IO redirection is occurring with the output from a Python program?

[Edward d'Auvergne]

Hi,

Thanks for the incredibly quick responses!  The os.isatty() call (and
sys.std*.isatty() calls as suggested by Chris Angelico at
http://mail.python.org/pipermail/python-list/2012-April/1291048.html)
work perfectly for this job!  I might have to do some testing later on
Windows though to see what happens when the ansi escape characters are
not supported.

Cheers,

Edward



On 17 April 2012 16:29, pat <pkugrinas at gmail.com> wrote:
> Check os.isatty(fd). It will return True if fd is a terminal-like device.
>
> On Tue, Apr 17, 2012 at 5:21 PM, Edward d'Auvergne <edward at nmr-relax.com>
> wrote:
>>
>> Hi,
>>
>> I was wondering if anyone knows of how to detect when IO redirection
>> of any form is happening within a Python program?  I would like to
>> emulate the behaviour of the GNU tools (for example the Unix commands
>> 'ls' or 'grep') whereby ascii escape sequences are printed if the
>> output is solely to the terminal, and in all other cases (redirection
>> to file via '>', pipes via '|', or more complex redirections) the
>> ascii escape characters are suppressed.  Any ideas would be
>> appreciated!
>>
>> Cheers,
>>
>> Edward
>>
>>
>> --
>> Edward d'Auvergne, PhD
>> Lead developer of the projects relax, minfx, and bmrblib
>> http://www.nmr-relax.com
>> http://gna.org/projects/minfx
>> http://gna.org/projects/bmrblib
>> --
>> http://mail.python.org/mailman/listinfo/python-list
>
>

--
Edward d'Auvergne, PhD
Lead developer of the projects relax, minfx, and bmrblib
http://www.nmr-relax.com
http://gna.org/projects/minfx
http://gna.org/projects/bmrblib