Example of reading from STDIN and Console TTY at the same time.

stdin_tty_demo.py

#!/usr/bin/env python

import os
import sys
import termios
import tty
import threading


def main():
    thread = threading.Thread(target=fetch, args=(sys.stdin,))
    thread.daemon = True
    thread.start()

    dev = '/dev/tty'

    with open(dev, 'a') as stderr:
        for char, console in read_char_tty(dev):
            print('>>', char, file=stderr)


def fetch(src):
    for line in src:
        print(line, end='')


def read_char_tty(src, encoding='ascii'):
    fd = os.open(src, os.O_RDWR)
    fo = os.fdopen(fd, 'rb')
    old_settings = termios.tcgetattr(fd)
    try:
        tty.setcbreak(fd)
        while True:
            yield str(fo.read(1), encoding=encoding), fo
    finally:
        termios.tcsetattr(fd, termios.TCSADRAIN, old_settings)
        fo.close()


if __name__ == "__main__":
    main()

• Ping stdout is piped to demo's stdin.
• All user input and output is performed on /dev/tty

ping google.com | python stdin_tty_demo.py