How to give a command line command from python?

This question already has an answer here:

Calling an external command in Python 50 answers

Executing command line programs from within python [duplicate] 5 answers

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Use subprocess

example:

>>> subprocess.call(["ls", "-l"])
0

>>> subprocess.call("exit 1", shell=True)
1

---

With subprocess one can conveniently perform command-line commands and retrieve the output or whether an error occurred:

import subprocess
def external_command(cmd): 
    process = subprocess.Popen(cmd.split(' '),
                           stdout=subprocess.PIPE, 
                           stderr=subprocess.PIPE)

    # wait for the process to terminate
    out, err = process.communicate()
    errcode = process.returncode

    return errcode, out, err

Example:

print external_command('ls -l')

It should be no problem to rearrange the return values.

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