Allow to manually exclude fields in dataclass_array_container

[alexfikl]

This isn't as nice as it could be due to backwards compatibility, but it seems to work.

EDIT: Actually, this doesn't work for what I wanted to use it for. I'll leave it here in case you think it's still useful, but otherwise feel free to close!

[inducer]

For the use case, could you simply stuff the extra fields into another dataclass that's not an array container? (And send them "along for the ride" that way?)

[alexfikl]

For the use case, could you simply stuff the extra fields into another dataclass that's not an array container? (And send them "along for the ride" that way?)

Yeah, I ended up doing a combination of that and some memoizing, since otherwise they would get out of sync.

[inducer]

In that case, I'd say let's hold off here. I won't close it, but I'll add a "shelved" tag.

[alexfikl]

@inducer Tried to use that Annotated type to explicitly exclude fields from the dataclass and it seems to be working quite nicely. Don't have a Python 3.6 environment to check that it works there too, but it should if typing_extensions works as advertised.