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Creation-Date: 2012-01-05T22:29:27+08:00

====== Python Subprocess Module Examples ======
Created Thursday 05 January 2012

http://www.moosechips.com/2010/07/python-subprocess-module-examples/

Some examples using the subprocess python module.

Make a system call three different ways:

#! /usr/bin/env python
import subprocess
# Use a sequence of args
return_code = subprocess.call(["echo", "hello sequence"])
 
# Set shell=true so we can use a simple string for the command
return_code = subprocess.call("echo hello string", shell=True)
 
# subprocess.call() is equivalent to using subprocess.Popen() and wait()
proc = subprocess.Popen("echo hello popen", shell=True)
return_code = proc.wait() # wait for process to finish so we can get the return code

Control stderr and stdout:

#! /usr/bin/env python
import subprocess
# Put stderr and stdout into pipes
proc = subprocess.Popen("echo hello stdout; echo hello stderr >&2", \
        shell=True, stderr=subprocess.PIPE, stdout=subprocess.PIPE)
return_code = proc.wait()
# Read from pipes
for line in proc.stdout:
    print("stdout: " + line.rstrip())
for line in proc.stderr:
    print("stderr: " + line.rstrip())