python - What is the correct way to switch from os.system to Popen for spawning an interactive shell? -

i trying rid of os.system in python code, of done, have 1 line can't seem convert.

os.system('/bin/sh -i -c "/bin/runner catch exts"') 

so far things tried:

p = subprocess.popen(['/bin/sh', '-i', '-c', '/bin/runner catch exts']) 

that returns:

/bin/sh: 1: cannot set tty process group (no such process) 

edit:

instead of running custom runner, i've tried "ls" , still same error.

os.system('/bin/sh -i -c "ls"') # works fine 

now trying convert --

p = subprocess.popen(['/bin/sh', '-i', '-c', 'ls']) # doesn't work 

returns:

/bin/sh: 1: cannot set tty process group (no such process) 

trying (this shouldn't work, suggested user in comments):

p = subprocess.popen('/bin/sh -i -c "ls"') 

returns:

oserror: [errno 2] no such file or directory 

interactive shells aren't possible popen. subprocess module designed give full control on stdin , stdout of child process can talk it.

an interactive shell, on other hand, needs tty (a terminal) , python should leave i/o streams alone. use case, can try pty module instead or stay os.system()