Structural difference between `sampled_from` and `one_of`: motivation and possible unification? about hypothesis

[vreuter]

Similar to motivation of having opened #3819

[Zac-HD]

Typically when I want to generate values, I'm thinking "here, blackbox randomisation enginge, are some alternative sources of values I want to generate", and would like to not need to think always about whether those sources are actual individual elements or are generators of them. The structural difference b/w these two functions (sampled_from and one_of) forces this awareness.

I think forcing this awareness is in fact desirable - elements and strategies are fundamentally different things, and there are multiple places where guessing which the user wants is just not going to work (as noted here).

You can pass a sequence of values to either though, so I don't think there's much more to be done here. (we can't accept st.sampled_from(*args), because a single-argument collection would then be ambiguous)