通过对应类型的类方法in_dll的方式来加载。

struct Test
{
int a;
int b;
Test(int x=5,int y = 6):a(x),b(y){}
};
extern "C" int hello = 1;
extern "C" int * hellop = &hello;
extern "C" Test t(1,2);
extern "C" void show()
{
hello = 10;
}

from ctypes import *
class Test(Structure):
_fields_ = [ ("a",c_int),("b",c_int)]
handle = CDLL("./test.so")
hello  = c_int.in_dll(handle,"hello")
hellop = POINTER(c_int).in_dll(handle,"hellop")
ttest  = Test.in_dll(handle,"t")
handle.show()
print(hello,hellop[0],ttest.a,ttest.b)

编译执行

g++ -m32 -shared -fPIC -o test.so test.cpp

python test.py