getkey.py

import sys

if sys.platform[:3] == 'win':
    import msvcrt
    def getkey():
        key = msvcrt.getch()
        if ord(key) == 224: #catch second event with arrow keys
            key = msvcrt.getch()
        return key
elif sys.platform[:3] == 'lin':
    import termios, sys, os
    TERMIOS = termios

    def getkey():
        fd = sys.stdin.fileno()
        old = termios.tcgetattr(fd)
        new = termios.tcgetattr(fd)
        new[3] = new[3] & ~TERMIOS.ICANON & ~TERMIOS.ECHO
        new[6][TERMIOS.VMIN] = 1
        new[6][TERMIOS.VTIME] = 0
        termios.tcsetattr(fd, TERMIOS.TCSANOW, new)
        c = None
        try:
            c = os.read(fd, 1)
        finally:
            termios.tcsetattr(fd, TERMIOS.TCSAFLUSH, old)
        return c

while True:
    k = getkey().decode()
    print(k)