python如何在C代码中从pyrun_simplefile返回输出

该代码是

{
char name[MAX_JSON_FIELD];
FILE *fp;
copy_cJSON(name,objs[0]);
if ( (fp= fopen(name, "r")) != 0 )
{
Py_Initialize();
PyRun_SimpleFile(fp, name);
Py_Finalize();
fclose(fp);
}
return(clonestr("return string"));
}


我如何获取它以返回python文件的输出而不是打印它？

解决方法:

I achieved this using a huge workaround. I made both C and Python read and write into a file. I didn’t find a better option yet.

我找到了一个实际的解决方案.它由2个文件组成：“ main.c”打开脚本文件“ script.py”,该脚本文件比较两个字符串(此处为“ Hello”和“ Mars”)并返回较长的字符串.我仍然感到奇怪,它需要大约20条命令来实现,也许还有更好的解决方案.

[main.c]

//compile me with "gcc main.c -I/usr/include/python2.7 -lpython2.7"
//original source: "http://python.haas.homelinux.net/python_kapitel_26_003.htm"
//owner is Peter Kaiser and Johannes Ernesti who published the Book "Python" under Galileo Computing
//Translation from german with many additional (and very unprofessional) comments and slight adaption by Cupacoffee, 17.02.2015.
//bugs, grammar mistakes and wrong explainations are my contribution
#include


int main (int argc, char *argv[])
{
char *result;//This char will receive the return value.
PyObject *module, *func, *prm, *ret;//These are some helping variables i don't understand.
Py_Initialize();
PySys_SetPath(".");//Sets the working path to the current path
module = PyImport_ImportModule("script");//Import of the script-file, note that the actual script name is "script.py"!
if (module != 0)//Asks if the script was loaded at all.
{
func = PyObject_GetAttrString(module, "compare_function");//Opens a function within the python script. Notice that you must use a function within the python script, because otherwise you can't return anything.
prm = Py_BuildValue("(ss)", "Hello", "Mars");//The "(ss)" means two strings are passed (replace with "i" for integer for instance), the "Hello" and "Mars" are the strings i pass to the script.
ret = PyObject_CallObject(func, prm);//Returns some python object i have literally no idea about ...
result = PyString_AsString(ret);// ... but luckily there's a function to cast it back to a c-compatible char*!
printf("The Script decdided that '%s' is longer!",result);
Py_DECREF(module);//cleanup?
Py_DECREF(func);//cleanup?
Py_DECREF(prm);//cleanup?
Py_DECREF(ret);//cleanup?
}
else//No script found
{
printf("Error: No script file named \"script.py\" was found!\n");
}
Py_Finalize();
return 0;
}


[script.py]

def compare_function(a, b):#this function takes 2 parameters, they are strings
return (a if min(a)

祝好运.

*咕umble,花了我2​​个多小时来格式化此文本,以便我可以发布它.*