python - Getting an error - AttributeError: 'module' object has no attribute 'run' while running subprocess.run(["ls", "-l"])

Question

I am running on a AIX 6.1 and using Python 2.7. Want to execute following line but getting an error.

subprocess.run(["ls", "-l"])
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
AttributeError: 'module' object has no attribute 'run'

Answer 1

The subprocess.run() function only exists in Python 3.5 and newer.

It is easy enough to backport however:

def run(*popenargs, **kwargs):
    input = kwargs.pop("input", None)
    check = kwargs.pop("handle", False)

    if input is not None:
        if 'stdin' in kwargs:
            raise ValueError('stdin and input arguments may not both be used.')
        kwargs['stdin'] = subprocess.PIPE

    process = subprocess.Popen(*popenargs, **kwargs)
    try:
        stdout, stderr = process.communicate(input)
    except:
        process.kill()
        process.wait()
        raise
    retcode = process.poll()
    if check and retcode:
        raise subprocess.CalledProcessError(
            retcode, process.args, output=stdout, stderr=stderr)
    return retcode, stdout, stderr

There is no support for timeouts, and no custom class for completed process info, so I'm only returning the retcode, stdout and stderr information. Otherwise it does the same thing as the original.