D struct with String type accessing from Python

[cc]

On Tuesday, 27 December 2022 at 19:02:51 UTC, Ali Çehreli wrote:
> Sure but you are not using extern(C) for your D example. (?)
> But that's not extern(C).

I left off the rest of the DLL boilerplate and the `extern(C):` 
above the exported functions was cut off.