def get_y_n(text):
    """ Get Y or N from user with a friendly message. No input returns False (N)
    """
    valid_answers = [ 'y','n','Y','N', '' ]
    while True:
        data = input(text)
        if data not in valid_answers:
            continue
        elif data=='y' or data=='Y':
            return True
        else:
            return False