如何从 Python 代码中导出 .so 符号

Question

I need to code some functionality in Python 3.8 and comply to a given C++ Interface. The code should replace an existing .so file which exposes this interface that is defined in a C++ header.

Here's the two options I considered so far:

1. Building a wrapper .so file by coding it in C++ including the interface header and delegating each call to Python with PyEval_CallObject(...)
2. Using Cython to compile an .so from a .pyx trying to export the needed symbols

Option 1 would most probably work, but seems a lot of work for a dumb wrapper. There must be a better way. I couldn't get option 2 to work, and I don't know if that's possible at all.

Happy to hear about any other ideas and hints.

Answer 1

In the end I picked 1. as the solution but using a nice library called pybind11 ( https://github.com/pybind/pybind11 ). It really simplifies both interfacing Python from c++ and c++ from Python especially when it comes to type conversions. In this way the wrapper .so file became really small.