Run shell from Python and make it active

Question

I use Python scripts to prepare some stuff for long quantum calculations. So, when I run target binary from terminal

targetbin file.inp > file.out

I can see that process is still running. With Python I do some automations:

#!/usr/bin/env python3

# blah blah blah

cmd = ' '.join([targetbin, modified_inp_file, some_options, '>', created_out_file])
# /usr/bin/targetbin /tmp/XXX.inp -a 1 -b 2 -c 3 > file.out

subprocess.Popen(cmd, shell=True)

run it from terminal:

pythonscript -x 1 -y 2 -z 3 file.inp

and it works fine, but it doesn't hold shell. After Python initiate the process I want to delegate it completely to the shell and then exit Python itself, as if I entered cmd myself. Is it possible?

Answer 1

You can try this way -

1. Run a shell script that run the python script.
2. Python will do the automations and will run the the process run by POPEN.
3. Shell script will do fg . (Alternatively, you can get the PID from python and run kill -CONT <pid> ).