How to execute an external binary reading from standard in

[Eric Brunel]

Markus O Kaukonen wrote:

> Dear all,
> 
> How to execute a exeternal (binary) program  reading from standard input
> in a python code ?
> For example :  /home/mok/my_prog.bin < my_input.txt
> 
> My system is Linux and the binary is written originally in fortran 90
> (if that should matter).
> 
> I tried
> os.popen('/home/mok/my_prog.bin < my_input.txt ')
> with no success

No need for popen here. Doing a:
os.system('/home/mok/my_prog.bin < my_input.txt ')
should work.

You may also do it "by hand" by doing:

p = os.popen('/home/mok/my_prog.bin', 'w')
p.write(open('my_input.txt').read())
p.close()

which is exactly the same thing as above, but done with Python. But the 
os.system above really should work...

HTH
-- 
- Eric Brunel <eric.brunel at pragmadev.com> -
PragmaDev : Real Time Software Development Tools - http://www.pragmadev.com