How can I use the subprocess module (i.e. call, check_call and Popen) to run more than one command?
For instance, lets say I wanted to execute the ls command twice in quick sucession, the following syntax does not work
import subprocess
subprocess.check_call(['ls', 'ls'])
returns:
CalledProcessError: Command '['ls', 'ls']' returned non-zero exit status 2.
You can use && or ;:
$ ls && ls
file.txt file2.txt
file.txt file2.txt
$ ls; ls
file.txt file2.txt
file.txt file2.txt
The difference is that in case of && the second command will be executed only if the first one was successful (try false && ls) unlike the ; in which case the command will be executed independently from the first execution.
So, Python code will be:
import subprocess
subprocess.run(["ls; ls"], shell=True)
Just execute the command twice.
import subprocess
subprocess.check_call(['ls'])
subprocess.check_call(['ls'])
That should be quick enough.
Edit
If you want to execute two commands in the same shell, write a shell script that executes them and run this script from Python.
This following code would work. But wouldn't it be better to just execute the ls command twice?
import subprocess
subprocess.Popen(["ls;ls"],shell=True)
for _ in range(2): subprocess.Popen('ls')not work for your solution?