python类getche()的实例源码

def input_with_timeout_windows(prompt, timeout, default): 
    start_time = time.time()
    print prompt,
    sys.stdout.flush()
    input = ''
    while True:
        if msvcrt.kbhit():
            chr = msvcrt.getche()
            if ord(chr) == 13: # enter_key
                break
            elif ord(chr) >= 32: #space_char
                input += chr
        if len(input) == 0 and (time.time() - start_time) > timeout:
            break
    if len(input) > 0:
        return input
    else:
        return default

def getreply():

    if sys.stdin.isatty():
        return input('?')
    else:
        if sys.platform[:3]=="win":
            import msvcrt
            msvcrt.putch(b'?')
            key=msvcrt.getche()
            msvcrt.putch(b'\n')
            return key
        else:
            assert False,'platform not supported'
            # linux?:open('/dev/tty').readline()[:-1]