如何在Ubuntu上运行的Python应用程序中加载.so库

Question

I have some shared object files (.so libs) that I need to load in my python project that will run on Ubuntu platform.

The goal is that I have some libraries that have already been converted into .so files and now I need to load them in my python project.

Can anyone share the detailed steps for this?

Answer 1

You can use ctypes for that, it's quite simple.

Say that you have a my-library.so with the following C function exported:

void say_hello(char *name) {
    printf("Hello, %s!\n", name);
}

You would load the library and call the function from Python like this:

>>> from ctypes import cdll
>>> mylib = cdll.LoadLibrary('./my-library.so')
>>> mylib.say_hello("world")
Hello, world!
>>>

Note that the leading ./ is important, otherwise LoadLibrary will look in the default library path and not the current folder.

Fore more information refer to the documentation for ctypes .