Execute multiline bash command from Python and get its output-CodePudding

I am under Python 3.8.10 in Ubuntu 20.04 trying to execute a multiline bash command and get its output. For this I am trying to combine this and this. My bash command is this:

/home/foo/.drsosc/drs-5.0.6/drscl << ASD      
info
exit
ASD

and it works as I want. Now in Python I have this:

from pathlib import Path
import subprocess

PATH_TO_drscl = Path.home()/Path('.drsosc/drs-5.0.6/drscl')

def send_command(cmd: str):
    execute_this = f'''{PATH_TO_drscl} << ASD
{cmd}
exit
ASD'''
    return subprocess.run([execute_this], stdout=subprocess.PIPE)

print(send_command('info'))

but I get

FileNotFoundError: [Errno 2] No such file or directory: '/home/foo/.drsosc/drs-5.0.6/drscl << ASD\ninfo\nexit\nASD'

It seems that the problem is with the '\n' not being properly interpreted?

CodePudding user response：

No, the problem is that you're trying to run small shell script but you're calling an executable that has a name composed of all commands in the script. Try with shell=True:

return subprocess.run([execute_this], stdout=subprocess.PIPE, shell=True)

CodePudding user response：

I found that this works as I want:

result = subprocess.run(
    str(PATH_TO_drscl), 
    input = f'{cmd}\nexit',
    text = True, 
    stdout = subprocess.PIPE
)