Simple linux cli style user choice function

choose.py

def choose(text, options="Yn"):
    """
    text:    prompt to the user.
    options: set of characters. one upper case may be
             used to indicate a default value.
    
    Examples:
    answer = choose("Continue?")
    # outputs: "Continue? (Y/n): "

    answer = choose("The next operation will be destructive! Continue?", "yN")
    if answer == 'n':
        sys.exit(0)
    """
    default = ''.join(char for char in options if char.isupper())
    default = default.strip().lower()
    if len(default) > 1:
        raise ValueError('Must not have more than 1 default option')
    others = ''.join(char for char in options if char.islower())
    others = others.strip().lower()
    while True:
        opts = '/'.join(options)
        result = input(f'{text} ({opts}): ')
        result = result.strip().lower()
        if not result and default:
            return default
        if result and result in others:
            return result