Question

C语言程序如何调用python程序

Answer 1

下面是一个例子：
首先是python的一个简单函数
class Hello:
def __init__(self, x):
self.a = x
def print(self, x=None):
print(x)
def xprint():
print("hello world")
if __name__ == "__main__":
xprint()
h = Hello(5)
h.print()1

下面是C语言
#include <python3.4m/Python.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
int main()
{
Py_Initialize();
// 将当前目录加入sys.path
PyRun_SimpleString("import sys");
PyRun_SimpleString("sys.path.append('./')");
// 导入hello.py模块
PyObject *pmodule = PyImport_ImportModule("hello");
// 获得函数xprint对象，并调用，输出“hello world\n”
PyObject *pfunc = PyObject_GetAttrString(pmodule, "xprint");
PyObject_CallFunction(pfunc, NULL);
// 获得类Hello并生成实例pinstance，并调用print成员函数，输出“5 6\n”
PyObject *pclass = PyObject_GetAttrString(pmodule, "Hello");
PyObject *arg = Py_BuildValue("(i)", 5);
PyObject *pinstance = PyObject_Call(pclass, arg, NULL);
PyObject_CallMethod(pinstance, "print", "i", 6);
Py_Finalize();
return 0;
}
编译命令如下：
gcc pyapi.c -lpython3.4m -o pyapi