simplecbreak.py

import tty
import termios
import sys


class Cbreak(object):
    def __enter__(self):
        self.original_stty = termios.tcgetattr(sys.stdin)
        tty.setcbreak(sys.stdin, termios.TCSANOW)

    def __exit__(self, *args):
        termios.tcsetattr(sys.stdin, termios.TCSANOW, self.original_stty)


if __name__ == '__main__':
    with Cbreak():
        print 'no enter required'
        print sys.stdin.read(2)