feature request: Ability to make display content and options different.

[ch-yx]

I like the design where the return value is the content of the option button. However, it can sometimes be a little inconvenient.For example, when doing internationalisation.

Could you please change the display text from opinion to f(opinion), where f is a global function defaults to lambda x:x to ensure backward compatibility. and users could change it into something like {"yes":"ok","no":"nope"}.get for easy internationalisation or diversity of styles.