[Question] Modifying setup.py with pybind used in a submodule

If I have a module built with pybind as sub-module how would my already constructed setup.py incorporate this? For example, my package is structured like this.

\--package_home
         setup.py
         \--base_package
                 __init__.py
                 a1.py
                 a2.py
                 \--sub_package
                          __init__.py
                          [pybind .so module would go here]
                          b1.py
                          

首先阅读 setup.py 以及 issue 中描述的包结构，尤其是 base_package/sub_package 和预期的 pybind 共享对象位置。确定现有的基于 Python 的构建应如何集成该子模块，并记录针对这一结构得到的设置。