how can i embed python in c?

Question

i wrote the C code as follow:

int main(int argc, char** argv)
{
 PyObject *mod, *name, *func;
 Py_Initialize();
 mod = PyImport_ImportModule("perf_tester");
 if(!mod)
 {
 printf("cannot find perf_tester.py");
 getchar();
 return -1;
 }
 name = PyObject_GetAttrString(mod, "CheckSharpness");
 if(!name)
 {
 printf("can not find CheckSharpness");
 getchar();
 return -1;
 }
 func = PyObject_GetAttrString(name,"F");
 if(!func)
 {
 printf("can not find function");
 getchar();
 return -1;
 }
 Py_Finalize();
 system("pause");
 return 0;
}

except for func, i could find mod and name.

and the partial of the perf_tester.py as follow:

def CheckSharpness(sample, edges, min_pass_mtf, min_pass_lowest_mtf,
 use_50p, mtf_sample_count, mtf_patch_width,
 mtf_crop_ratio=_MTF_DEFAULT_CROP_RATIO,
 n_thread=1):
 mtfs = [mtf_calculator.Compute(sample, line_start[t], line_end[t],
 mtf_patch_width, mtf_crop_ratio,
 use_50p)[0] for t in perm]
 F = open("data.txt","w")
 F.write(str(mtfs))
 F.close()

what could I do?

• Fred Foo: You should call PyErr_PrintEx(0) whenever a Python C API function fails. Also, don't tag C question as c++, please.

Answer 1

F is a local variable, it's not a member of CheckSharpness. It does not exist when CheckSharpness is not currently running, and each invocation of CheckSharpness has its own copy. There's no way to access this from outside.