Question

我的myPyTest.c文件中有以下代码

#include<python/Python.h>
#include "libtest.h"

static PyObject * callThatFunc(PyObject *self, PyObject *args) {
    const char *a, *b, *c;
    if (!PyArg_ParseTuple(args, "S", &a, &b, &c))
        return NULL;
    printf("%s", returnThis(a));
    return PyString_FromString(b);
}

static PyMethodDef BarMethods[] = {
    {"call_bar",  callThatFunc, METH_VARARGS,
        "Execute a shell command."},
   {NULL, NULL, 0, NULL}
};

PyMODINIT_FUNC
initbar(void)
{
    (void) Py_InitModule("bar", BarMethods);
}

int main() {
    printf("Hello");
    return 0;
}

检查this以获取上述代码

现在我在my_go_call.go文件中有以下golang代码。

package main

import "C"

//export returnThis
func returnThis(myString *C.char) *C.char {
    var result *C.char
    myStringGo := C.GoString(myString)
   result = C.CString("Hello, " + myStringGo)
   return result
}

func main() {
}

我使用命令（MAC）创建了共享库 go build -ldflags -s -buildmode=c-shared -o libtest.so my_go_call.go

然后我有setup.py文件为python构建c扩展。 setup.py代码如下

from distutils.core import setup, Extension

module1 = Extension('bar',
                libraries = ['test'],
                library_dirs = ['/path/to/lib'],
                sources = ['myPyTest.c'])
setup (name = 'PackageName',version = '1.0',description = 'This is a demo package',ext_modules = [module1])

现在我正在使用以下命令构建和安装我的扩展程序

python setup.py build
python setup.py install

每当我在python解释器中调用我的函数时，我都会遇到以下错误。

>>> import bar
>>> dir(bar)
['__doc__', '__file__', '__name__', '__package__', 'call_bar']
>>> bar.call_bar('a','b','c')
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: function takes exactly 1 argument (3 given)

使用C从python调用golang函数

0 个答案: