Looping over a shell script with python

hello_world.sh

#!/bin/bash

echo "Hello World: Line 1"
echo "Hello World: Line 2"

for i in $@; do
        echo $i
done

readscript.py

#!/usr/bin/env python

def readscript(script, *args):
        import subprocess

        command=list(args)
        command.insert(0,script)
        proc = subprocess.Popen(command,stdout=subprocess.PIPE)

        output = []
        for line in iter(proc.stdout.readline,''):
                output.append(line.rstrip())

        return output



commandoutput = readscript("./hello_world.sh", "arg1", "arg2", "arg3")

print commandoutput