Debugging an external System command in Python

Question

#!/usr/bin/python



def copyPatchTempToPatchStage(destinationLoction):

 command='/usr/bin/python '+destinationLoction+'/PatchGen.py '
 print command
 executeCommand(command)




def executeCommand(command):

 p_output=subprocess.Popen(command, stdout=subprocess.PIPE, shell=True)
 p_output.communicate()
 p_output.wait()


if __name__ == '__main__':

 destinationLoction="/scratch/app/product/fmw/obpinstall/patching/patchGenerationPath/2015-12-28/T14_OPATCH/100005135/PATCH_TEMP"
 copyPatchTempToPatchStage(destinationLoction)

Now while debbuging the python file it does not enters the PatchGen.py

Is there any way to debug System commands

If you say what's going wrong (i.e. why you want to debug it) we may be able to suggest ways to solve that problem — doctorlove
– doctorlove, Commented Dec 29, 2015 at 12:14

Caridorc · Accepted Answer · 2015-12-29 11:50:23Z

3

No it is not possible to debug System commands.

If you write p_output=subprocess.Popen(command, stdout=subprocess.PIPE, shell=True) Python does not know what is being run, it may be anything, not just a Python script.

What you want is importing that module and running its main function from your current file. This will allow you to see debugging information.

answered Dec 29, 2015 at 11:50

Caridorc

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2 Comments

Rohan Gala Over a year ago

If I will directly call the main function then wont be able to use popen pipe command

Caridorc Over a year ago

@RohanGala I just suggested a workaround. In general, it is not possible to debug popen pipe commands.

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