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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def main():
 """This main function saves the stdin termios settings, calls real_main, and restores stdin termios settings when it returns. """

    save_settings = None
    stdin_fd = -1
    try:
        import termios
        stdin_fd = sys.stdin.fileno()
        save_settings = termios.tcgetattr(stdin_fd)
    except:
        pass
    try:
        real_main()
    finally:
        if save_settings:
            termios.tcsetattr(stdin_fd, termios.TCSANOW, save_settings)