# Cross platform getch() and putch() implementation
# by Mario Vilas (mvilas at gmail.com)
# based on http://snippets.dzone.com/posts/show/915

__all__ = [ 'getch', 'putch' ]

import select
import socket
import os
import sys
import time

try:
    import msvcrt
except ImportError:
    msvcrt = None

try:
    import tty
except ImportError:
    tty = None

try:
    import termios
except ImportError:
    termios = None

class Getch:

    def __init__( self ):
        if msvcrt != None:
            self.getch = self.getch_windows
        elif tty != None and termios != None:
            self.getch = self.getch_unix
        else:
            raise Exception, "Unknown target OS"

    def getch_unix( self ):
        fd = sys.stdin.fileno()
        old_settings = termios.tcgetattr( fd )
        try:
            tty.setraw( sys.stdin.fileno() )
            ch = sys.stdin.read( 1 )
        finally:
            termios.tcsetattr( fd, termios.TCSADRAIN, old_settings )
        return ch

    def getch_windows( self ):
        ch = msvcrt.getch()
        if ch == '\r':
            ch = '\r\n'
        return ch

getch = Getch().getch

def putch( ch ):
    sys.stdout.write( ch )
    sys.stdout.flush()

if __name__ == '__main__':
    while 1:
        putch( getch() )