ImportError: No module named signal

[leas63]

Hello,

I have added the following commands to a python script:

from subprocess import Popen

prog=subprocess.Popen(["./program"],stdin=PIPE,stdout=PIPE)


and when I try to run it, I get the following error:

Executing Python script /home/leas/Diploma/sniper-5.3/sim.scripts.py
Traceback (most recent call last):
  File "/home/leas/Diploma/sniper-5.3/sim.scripts.py", line 5, in <module>
    execfile("/home/leas/Diploma/sniper-5.3/scripts/stattracel.py")
  File "/home/leas/Diploma/sniper-5.3/scripts/stattracel.py", line 12, in <module>
    from subprocess import Popen
  File "/tmp/tmp.dxEiJiXap2/python_kit/lib/python2.7/subprocess.py", line 398, in <module>
ImportError: No module named signal
Cannot open Python script /home/leas/Diploma/sniper-5.3/sim.scripts.py


Can anyone help?Thanks!

Alexander

[Trevor E. Carlson]

Alexander,

Instead of Popen, you might want to try using os.system() to run external applications. We specifically removed a number of features from the Python distribution to make it safe to embed into a Pin tool. It should be possible to link against your system Python library or one that you download and compile yourself, but we will not support any problems that you run into.

Trevor

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[leas63]

I also want to pass data between the processes.
I tried os.popen , and I succesfully read the output of the second process, but when I try os.popen2 ,I get the same ImportError as before. Isn't that odd? I'd like to use popen2 to write data to the second process.

[Wim Heirman]

Alexander,

subprocess.Popen doesn't seem to actually use signals unless you explicitly ask it to by calling Popen.send_signal, .terminate or .kill. If you create an empty signal.py file somewhere where Python can find it (in python/scripts, or in python_kit/lib/python2.7), it will probably work. Just don't try sending signals to your subprocess.

Regards,

Wim