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Yesterday, I wrote and ran a python script which executes a shell using subprocess.Popen(command.split()) where command is string which constitutes .sh script and its argument. This script was working fine until yesterday. Today, I ran the same script and now I am continuously hitting this error.
p=subprocess.Popen(shell_command.split()) File "/usr/lib/python2.7/subprocess.py", line 679, in __init__ errread, errwrite) File "/usr/lib/python2.7/subprocess.py", line 1249, in _execute_child raise child_exception OSError: [Errno 8] Exec format error I know there are similar questions that have been asked before related to this question, but in my case I tried everything which doesn't solve my purpose. Using shell=True does not work because my shell script calls an another shell script before which some environment has to be set in order to run that script. I am badly stuck in this. I just restart my system once. I am using ubuntu 12.04
EDIT:
import subprocess import os import sys arg1=sys.argv[1] arg2=sys.argve[2] shell_command = 'my_path/my_shell.sh ' + arg1 + ' '+ arg2 P = subprocess.Popen(shell_command.split()) P.wait() my_shell.sh:
arg1=$1 arg2=$2 cd $TOP setup the environment and run shell script build the kernel ... execute shell command ..... 
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The subprocess module defines one class, Popen and a few wrapper functions that use that class. The constructor for Popen takes arguments to set up the new process so the parent can communicate with it via pipes. It provides all of the functionality of the other modules and functions it replaces, and more.
It's an ARM executable, i.e. you downloaded the wrong executable format or compiled for the wrong platform. You have to get the right executable or recompile. – Kalle Richter.
The main difference is that subprocess. run() executes a command and waits for it to finish, while with subprocess. Popen you can continue doing your stuff while the process finishes and then just repeatedly call Popen. communicate() yourself to pass and receive data to your process.
The Python subprocess call() function returns the executed code of the program. If there is no program output, the function will return the code that it executed successfully. It may also raise a CalledProcessError exception.
I solved this by putting this line at the top of the called shell script:
#!/bin/sh
That will guarantee that the system always uses the correct interpreter when running your script.
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