Use subprocess.run for Python < 3.5

subprocess_run.py

# Source: https://github.com/mitsuhiko/pipsi/blob/master/pipsi/__init__.py

from collections import namedtuple
import subprocess

def proc_output(s):
    s = s.strip()
    if not isinstance(s, str):
        s = s.decode('utf-8', 'replace')
    return s

try:
    subprocess.run

    def run(*args, **kw):
        kw.update(stdout=subprocess.PIPE, stderr=subprocess.PIPE)
        r = subprocess.run(*args, **kw)
        r.stdout, r.stderr = map(proc_output, (r.stdout, r.stderr))
        return r
except AttributeError:  # no `subprocess.run`, py < 3.5
    CompletedProcess = namedtuple('CompletedProcess',
                                  ('args', 'returncode', 'stdout', 'stderr'))

    def run(argv, **kw):
        p = subprocess.Popen(
            argv, stdout=subprocess.PIPE, stderr=subprocess.PIPE, **kw)
        out, err = map(proc_output, p.communicate())
        return CompletedProcess(argv, p.returncode, out, err)