Thanks for the suggestion. It turned out (for a rather convoluted reason) that the program that I thought I'd be running didn't exist. My bad :-).
Victor On Apr 22, 2:58 pm, Jason Grout <[email protected]> wrote: > On 04/22/2010 12:18 PM, VictorMiller wrote: > > > > > I tried using sage -python > > > It still bombs out, but slightly differently: it now does a > > > raise child_exception in the _execute_child method of subprocess, and > > gets the error string > > > OSError: [Errno 2] No such file or directory > > > On Apr 22, 12:58 pm, Jason Grout<[email protected]> wrote: > >> On 04/22/2010 11:38 AM, VictorMiller wrote: > > >>> I have some old Python programs that I've been using, and would like > >>> to use them as part of SAGE. One particular function I have uses the > >>> standard python module subprocess to call an external program, and > >>> then process the output from that. This has worked fine in python for > >>> a number of years (through various python version changes). However, > >>> when I try to use it from within SAGE, when subprocess is finished > >>> with the process and it tries to close the process handle it gets an > >>> error > > >>> OSError: [Errno 2] No such file or directory. > > >>> [Actually I'm not sure if it's even able to spawn the process at all] > > My guess is that your process can't find your executable. Try doing > this (which will check that subprocess works and also check that your > executable is found: > > import subprocess > p=subprocess.Popen("/bin/sh",stdin=subprocess.PIPE,stdout=subprocess.PIPE,stderr=subprocess.STDOUT) > output=p.communicate('which ls\n') > print output[0], output[1] > > Replace the "which ls" command with "which <YOUR PROGRAM>" to just > double-check that the spawned shell can see your program. > > The above works for me in Sage, so I think subprocess works just fine in > Sage. > > Thanks, > > Jason > > -- > Jason Grout > > -- > To post to this group, send email to [email protected] > To unsubscribe from this group, send email to > [email protected] > For more options, visit this group > athttp://groups.google.com/group/sage-support > URL:http://www.sagemath.org -- To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
