用C/C++扩展Python（Extending Python with C or C++）

用c/c++扩展python的方式有很多，比较常见的方式：1）native，2）swig，3）boost_python，这里简单介绍一下python自带的native方式。官方文档：http://docs.python.org/extending/extending.html1.简单示例： 1.1 span_system.cpp//span_system.cpp #include <Python.h>static PyObject *spam_system(PyObject *self, PyObject *args)

{
const char *command;
int sts;

if (!PyArg_ParseTuple(args, "s", &command))
return NULL;
sts = system(command);
return Py_BuildValue("i", sts);
}

static PyMethodDef libmypyext_methods[]

{

{"spam_system", spam_system, METH_VARARGS, "Description"}，

{0, 0}

};

PyMODINIT_FUNC initlibgongmingpyext(){Py_InitModule3("libmypyext", libmypyext_methods, "A Python Extension for Test");}

1.2 编译链接成so

g++ -o libmypyext.so -export-dynamic -m64 -shared span_system.cpp

1.3 python调用#span_system.pyimport libmypyextdef spam_system(command):print libmypyext.spam_system()if __name__ == '__main__':    if len(sys.argv) == 2:        spam_system(sys.argv[1])    else:           print '''python span_system.py your_command'''        sys.exit()