Run command and handle pipes.

run.py

import subprocess

def run(command, input=None):
  try:
    process = subprocess.Popen(
      command, stdin=subprocess.PROCESS,
      stdout=subprocess.PROCESS, stderr=subprocess.PROCESS,
      close_fds=True)
    if input:
      process.stdin.write(input)
    process.stdin.close()
    result = process.stdout.read()
    ret = process.wait()
    return ret, result
  except OSError, (e):
    return (e.errno, e.args[1])


print run(['ls', '-1'])  # (0, 'run.py\n')
print run('sort', 'hoge\nfuga\npiyo\n')  # (0, 'fuga\nhoge\npiyo\n')
print run('hoge')  # (2, 'No such file or directory')
print run(['rm', 'non-exist.txt'])  # (1, '')