Document how import chains are affected by `sys.setrecursionlimit`

While working on a very large Python codebase, I ran into some undocumented behaviour.

A chain of imports (i.e. one module imports another, which imports another, which imports another) will cause a RecursionError to be raised if the Python recursion limit is not high enough. (Note, there is no recursion involved.)

Longer chains of imports can be enabled by increasing the recursion limit. But the limit has no effect beyond a certain point (around 10,000). (I believe this is due to Py_C_RECURSION_LIMIT, mentioned in by Serhiy Storchaka.)

A workaround is available: you can import the modules in a different order.

I've created a repository with more analysis and scripts to reproduce the problem. I also started a Discuss topic on the subject.

From what I understand, this is a complex problem that is unlikely to be fixed. But I think it would be helpful to document this, probably in the docs for sys.setrecursionlimit.

I would be happy to try to do a pull request, assuming the core team agree that it should be added.

Bắt đầu với tài liệu về sys.setrecursionlimit và sử dụng repository import-recursion-demo được liên kết cùng các script tái hiện của repository này để xác minh hành vi. Công việc được xem là hoàn tất khi đã ghi lại độ dài mà chuỗi import cần đạt tới để kích hoạt RecursionError, giới hạn trên gần đúng và workaround sử dụng thứ tự import thay thế.