Add PyArray::borrow_from_array to expose array data with ownership being tied to anyother Python object

[adamreichold]

Fixes #154

[aldanor]

@adamreichold Yes, I guess this is pretty much what I meant 👍

I think if it works out, it will resolve the original issue (in fact, if it does, it may be even worthwhile adding a simplest example, with a pyclass holding two different arrays and exposing them via getters?).

[adamreichold]

I think if it works out, it will resolve the original issue (in fact, if it does, it may be even worthwhile adding a simplest example, with a pyclass holding two different arrays and exposing them via getters?).

Will add the example after I figured out the CI issues. I would be glad if you could give this a try within your actual environment as I am not too confident about the unit test.

[adamreichold]

a simplest example, with a pyclass holding two different arrays and exposing them via getters?

I think, a single field as in the unit test is actually enough.

[kngwyu]

Thank you! This is an apparently dangerous API but I'm happy to have this if there are some demands.

[adamreichold]

This is an apparently dangerous API

Indeed. I just noticed that I very much messed up the type signature. Pushed a fixed version.

[kngwyu]

Thanks!