ejecutar comado de pgpool y colocarle la contraseña en el la terminal

def pgpool_cmd(cmd):
  password = getpass.getpass()
  pgpool_cmd = subprocess.Popen(cmd, shell=True, stdin=subprocess.PIPE)
  pgpool_cmd.stdin.write(password + '\n')
  pgpool_cmd.stdin.flush()
  print pgpool_cmd.communicate()
    
pgpool_cmd('sudo service pgpool start')