import sys
class _Getch:
	"""Gets a single character from standard input. Does not echo to the screen."""
	def __init__(self):
		try:
			self.impl = _GetchWindows()
		except ImportError:
			self.impl = _GetchUnix()

	def __call__(self):		
		ch = self.impl()
		if ord(ch) == 127:
			ch = '\x08'
			sys.stdout.write('\x08\x20')
		return ch

class _GetchUnix:
	def __init__(self):
		import tty, sys
		self.text = ''
		self.rch = ''

	def __call__(self):
		import sys, tty, termios, select
		fd = sys.stdin.fileno()
		fout = sys.stdout.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

class _GetchWindows:
	def __init__(self):
		import msvcrt

	def __call__(self):
		import msvcrt
		return msvcrt.getch()

getch = _Getch()

#!/usr/bin/python
#coding:utf-8

from cli import getch
import sys

while True:
	ch = getch.__call__()
	sys.stdout.write(ch)
	if ord(ch) == 90: break