I had trouble getting my Python script to take a command line argument inside a subprocess.Popen call. I do not mean that I had trouble with something like "python my_script.py arg". No. Here is what was failing for me:
import subprocess
proc = subprocess.Popen(‘executable_file.bin arg’)
proc.communicate()
What I got was "file not found" errors. The Popen call could not recognize the argument as an argument. It thought it was part of the file name.
I could run the command from a command line in a terminal.
executable_file.bin arg
worked in a command line. Well, there is a way to make Popen work like a command line in a terminal/shell. This is what works.
subprocess.Popen(‘executable_file.bin arg’, shell=True)
The “shell=True” makes ‘executable_file.bin arg’work like it would in a terminal shell.
Robert
