Interacting with bash from python

Try with this example:

import subprocessproc = subprocess.Popen(['/bin/bash'], stdin=subprocess.PIPE, stdout=subprocess.PIPE)stdout = proc.communicate('ls -lash')print stdout

You have to read more about stdin, stdout and stderr. This looks like good lecture: http://www.doughellmann.com/PyMOTW/subprocess/

EDIT:

Another example:

>>> process = subprocess.Popen(['/bin/bash'], shell=False, stdin=subprocess.PIPE, stdout=subprocess.PIPE)>>> process.stdin.write('echo it works!\n')>>> process.stdout.readline()'it works!\n'>>> process.stdin.write('date\n')>>> process.stdout.readline()'wto, 13 mar 2012, 17:25:35 CET\n'>>> 

Use this example in my other answer: https://stackoverflow.com/a/43012138/3555925

You can get more details in that answer.

#!/usr/bin/env python# -*- coding: utf-8 -*-import osimport sysimport selectimport termiosimport ttyimport ptyfrom subprocess import Popencommand = 'bash'# command = 'docker run -it --rm centos /bin/bash'.split()# save original tty setting then set it to raw modeold_tty = termios.tcgetattr(sys.stdin)tty.setraw(sys.stdin.fileno())# open pseudo-terminal to interact with subprocessmaster_fd, slave_fd = pty.openpty()# use os.setsid() make it run in a new process group, or bash job control will not be enabledp = Popen(command,          preexec_fn=os.setsid,          stdin=slave_fd,          stdout=slave_fd,          stderr=slave_fd,          universal_newlines=True)while p.poll() is None:    r, w, e = select.select([sys.stdin, master_fd], [], [])    if sys.stdin in r:        d = os.read(sys.stdin.fileno(), 10240)        os.write(master_fd, d)    elif master_fd in r:        o = os.read(master_fd, 10240)        if o:            os.write(sys.stdout.fileno(), o)# restore tty settings backtermios.tcsetattr(sys.stdin, termios.TCSADRAIN, old_tty)

An interactive bash process expects to be interacting with a tty. To create a pseudo-terminal, use os.openpty(). This will return a slave_fd file descriptor that you can use to open files for stdin, stdout, and stderr. You can then write to and read from master_fd to interact with your process. Note that if you're doing even mildly complex interaction, you'll also want to use the select module to make sure that you don't deadlock.