util.py 文件源码

def readchar(wait_for_char=0.1):
    old_settings = termios.tcgetattr(sys.stdin)
    tty.setcbreak(sys.stdin.fileno())
    res = b''
    try:
        if select.select([sys.stdin, ], [], [], wait_for_char)[0]:
            res = os.read(sys.stdin.fileno(), 1)
        while select.select([sys.stdin, ], [], [], 0.0)[0]:
            res += os.read(sys.stdin.fileno(), 1)
        if res:
            return res
    finally:
        termios.tcsetattr(sys.stdin, termios.TCSADRAIN, old_settings)
    return None