Add pure-python functions to the pybind11 library

[a-jp]

Hi,
So far my pybind11 library embeds the interpreter (pybind11_add_module) and produces me a library of wrapped c++ code, that I can call from python. To allow seamless operation for the user, I have functions that would be better/faster/easier to write in pure python, rather than writing them in long-hand in c++ and creating a wrapper. But, I'd like them to be "added" (I know that's the wrong word) to the same python module that pybind11 creates for my pure c++ code. Is that possible so that the user could call them and in this instance they happen (unknowingly) to be just calling pure python from another .py file? Could I have a MWE to do that? Hopefully I've explained that correctly. Thanks

[a-jp]

Could anyone help here? Even just to confirm that the above is or is not possible with pybind11?

[jnooree]

You could just import the file and/or function from C++ side.

Ref: https://pybind11.readthedocs.io/en/stable/advanced/pycpp/object.html#accessing-python-libraries-from-c

[a-jp]

Ok yep, but how to I add that to the python ".so" that is generated by my cmake that I can then import into other python file. I'd like the pure-python function added to that singular python library that at present just exposes my c++ code via pybind11.

[jnooree]

That would be impossible I guess then.. Maybe publish the python files in pypi then instruct the users to install it?

[jnooree]

Oh, using py::eval/py::exec might do the trick (though quite a dirty hack IMO)

https://pybind11.readthedocs.io/en/stable/advanced/pycpp/utilities.html