C语言调用python代码-CFANZ编程社区

C语言调用python代码

C语言源代码

C语言源代码，embed.c

/*
 * embed.c
 *
 *  Created on: 2022年12月30日
 *      Author: xzlAwin
 */

#include <Python.h>

/* Execute func(x,y) in the Python interpreter.  The
   arguments and return result of the function must
   be Python floats */

double call_func(PyObject *func, double x, double y) {
	PyObject *args;
	PyObject *kwargs;
	PyObject *result = 0;
	double retval;

	/* Make sure we own the GIL */
	PyGILState_STATE state = PyGILState_Ensure();

	/* Verify that func is a proper callable */
	if (!PyCallable_Check(func)) {
		fprintf(stderr,"call_func: expected a callable\n");
		goto fail;
	}

	/* Build arguments */
	args = Py_BuildValue("(dd)", x, y);
	kwargs = NULL;

	/* Call the function */
	result = PyObject_Call(func, args, kwargs);
	Py_DECREF(args);
	Py_XDECREF(kwargs);

	/* Check for Python exceptions (if any) */
	if (PyErr_Occurred()) {
		PyErr_Print();
		goto fail;
	}

	/* Verify the result is a float object */
	if (!PyFloat_Check(result)) {
		fprintf(stderr,"call_func: callable didn't return a float\n");
		goto fail;
	}

	/* Create the return value */
	retval = PyFloat_AsDouble(result);
	Py_DECREF(result);

	/* Restore previous GIL state and return */
	PyGILState_Release(state);
	return retval;

fail:
	Py_XDECREF(result);
	PyGILState_Release(state);
	abort();
}

/* Load a symbol from a module */
PyObject *import_name(const char *modname, const char *symbol) {
	PyObject *u_name, *module;
	u_name = PyUnicode_FromString(modname);
	module = PyImport_Import(u_name);
	Py_DECREF(u_name);
	return PyObject_GetAttrString(module, symbol);
}

/* Simple embedding example */
int main() {
	PyObject *pow_func;
	double x;

	Py_Initialize();
	/* Get a reference to the math.pow function */
	pow_func = import_name("math","pow");

	/* Call it using our call_func() code */
	for (x = 0.0; x < 10.0; x += 0.1) {
		printf("%0.2f %0.2f\n", x, call_func(pow_func,x,2.0));
	}
	/* Done */
	Py_DECREF(pow_func);
	Py_Finalize();
	system("pause");
	return 0;
}

编译配置文件

win10环境，Makefile配置文件

all::
	gcc -W -I F:/sdk/python/Python37/include \
	-L F:/sdk/python/Python37/libs embed.c -l python37

Linux环境，Makefile配置文件

all::
	cc -g embed.c -I/usr/local/include/python3.3m \
	-L/usr/local/lib/python3.3/config-3.3m -lpython3.3m

运行编译命令

win10环境

gcc -W -I F:/sdk/python/Python37/include -L F:/sdk/python/Python37/libs embed.c -l python37

Linux环境

cc -g embed.c -I/usr/local/include/python3.3m \
-L/usr/local/lib/python3.3/config-3.3m -lpython3.3m

测试

运行成功，显示

0.00 0.00
0.10 0.01
0.20 0.04
0.30 0.09
0.40 0.16
0.50 0.25
0.60 0.36
0.70 0.49
0.80 0.64
0.90 0.81
1.00 1.00
1.10 1.21
1.20 1.44
1.30 1.69
1.40 1.96
1.50 2.25
1.60 2.56
1.70 2.89
1.80 3.24
1.90 3.61
2.00 4.00
2.10 4.41
2.20 4.84
2.30 5.29
2.40 5.76
2.50 6.25
2.60 6.76
2.70 7.29
2.80 7.84
2.90 8.41
3.00 9.00
3.10 9.61
3.20 10.24
3.30 10.89
3.40 11.56
3.50 12.25
3.60 12.96
3.70 13.69
3.80 14.44
3.90 15.21
4.00 16.00
4.10 16.81
4.20 17.64
4.30 18.49
4.40 19.36
4.50 20.25
4.60 21.16
4.70 22.09
4.80 23.04
4.90 24.01
5.00 25.00
5.10 26.01
5.20 27.04
5.30 28.09
5.40 29.16
5.50 30.25
5.60 31.36
5.70 32.49
5.80 33.64
5.90 34.81
6.00 36.00
6.10 37.21
6.20 38.44
6.30 39.69
6.40 40.96
6.50 42.25
6.60 43.56
6.70 44.89
6.80 46.24
6.90 47.61
7.00 49.00
7.10 50.41
7.20 51.84
7.30 53.29
7.40 54.76
7.50 56.25
7.60 57.76
7.70 59.29
7.80 60.84
7.90 62.41
8.00 64.00
8.10 65.61
8.20 67.24
8.30 68.89
8.40 70.56
8.50 72.25
8.60 73.96
8.70 75.69
8.80 77.44
8.90 79.21
9.00 81.00
9.10 82.81
9.20 84.64
9.30 86.49
9.40 88.36
9.50 90.25
9.60 92.16
9.70 94.09
9.80 96.04
9.90 98.01
10.00 100.00
请按任意键继续. . .