Inside python code, how do I run a .sh script?

Question

Will it continue the code after it's run? Or will it stop at that line until the script is done?

Answer 1

Using subprocess.call is the easiest way. It will not return until the executed program has terminated. Have a look at the other methods of the subprocess module if you need different behaviour.

• wordbug: subprocess.call was deprecated in 3.5: subprocess.run should be used instead.

Answer 2

import os
os.system('./script.sh')

python script won't stop until sh is finished

• ThiefMaster: "The subprocess module provides more powerful facilities for spawning new processes and retrieving their results; using that module is preferable to using this function." - for example using subprocess.call() will not execute a shell to run whatever you run so you won't have to take care of argument injection if you pass any dynamically generated arguments to your program.
• Frost.baka: You can also suggest subprocess.Popen -- this could allow you to control the execution, wait for it, terminate, etc. But as practice shows os.system often provides all the functionality you need.
• ThiefMaster: subprocess.call provides the easy/simple API too ;)

Answer 3

You can use os.system or subprocess.Popen or subprocess.call but when using subprocess methods make sure you use shell=True. And executing it via system call in all these methods is blocking. The python script will complete and then go the next step.

• ThiefMaster: No need to use shell=True.. Shellscripts with a shebang line (or even invoking the shell with the script as an argument) can be executed fine with exec()-style functions.