Running Bash commands in Python

Question

On my local machine, I run a python script which contains this line

bashCommand = \"cwm --rdf test.rdf --ntriples > test.nt\"
os.system(bashCommand)
         


        

Answer 1

Don't use os.system. It has been deprecated in favor of subprocess. From the docs: "This module intends to replace several older modules and functions: os.system, os.spawn".

Like in your case:

bashCommand = "cwm --rdf test.rdf --ntriples > test.nt"
import subprocess
process = subprocess.Popen(bashCommand.split(), stdout=subprocess.PIPE)
output, error = process.communicate()