how to import class instead of rosrun ?

[IaroslavS]

Hi !
I have ros1 (noetic) package in C++ (https://github.com/ov2slam/ov2slam)
I want to convert it to python so that I can import one class and create objects that can later call functions of this class. I want to dot it without rosrun <package> <script>, I want just something like this:
from import
object = class()
object.feed_image()

something like that. How should I confgure CMakeLists in order to import class instead of rosrun package ? Thanks in advance)