Simple example from docs not working for me (Failed to load "test.py"). I try what other people say: ask ask2
All not working!
code:
#include <Python.h>
#include <fstream>
#include <iostream>
#include <string>
int
main(int argc, char *argv[])
{
wchar_t **argv_copy = (wchar_t **)PyMem_Malloc(sizeof(wchar_t*)*argc);
for (int i = 0; i < argc; ++i)
{
size_t argsize = mbstowcs(NULL, argv[i], 0);
size_t count;
if (argsize == (size_t) -1)
{
fprintf(stderr, "Could not convert argument %d to string\n", i);
return 1;
}
argv_copy[i] = (wchar_t *) PyMem_Malloc(
(argsize + 1) * sizeof(wchar_t));
if (!argv_copy[i])
{
fprintf(stderr, "out of memory\n");
return 1;
}
count = mbstowcs(argv_copy[i], argv[i], argsize + 1);
if (count == (size_t) -1)
{
fprintf(stderr, "Could not convert argument %d to string\n", i);
return 1;
}
}
PyObject *pName, *pModule, *pDict, *pFunc;
PyObject *pArgs, *pValue;
int i;
if (argc < 3) {
fprintf(stderr,"Usage: call pythonfile funcname [args]\n");
return 1;
}
Py_SetProgramName(argv_copy[0]); /* optional but recommended */
Py_Initialize();
PySys_SetArgv(argc, argv_copy); // must call this to get sys.argv and relative imports
PyRun_SimpleString("import os, sys");
PyRun_SimpleString("sys.path.append(os.getcwd())");
PyRun_SimpleString("import sys");
PyRun_SimpleString("sys.path.append(\".\")");
PyRun_SimpleString("import os, sys\n"
"print(\"sys.argv:\", sys.argv)\n"
"print(\"cwd:\", os.getcwd())\n"
"print(\"sys.path:\", sys.path)\n"
);
pName = PyUnicode_FromString(argv[1]);
/* Error checking of pName left out */
pModule = PyImport_Import(pName);
Py_DECREF(pName);
if (pModule != NULL) {
pFunc = PyObject_GetAttrString(pModule, argv[2]);
/* pFunc is a new reference */
if (pFunc && PyCallable_Check(pFunc)) {
pArgs = PyTuple_New(argc - 3);
for (i = 0; i < argc - 3; ++i) {
pValue = PyLong_FromLong(atoi(argv[i + 3]));
if (!pValue) {
Py_DECREF(pArgs);
Py_DECREF(pModule);
fprintf(stderr, "Cannot convert argument\n");
return 1;
}
/* pValue reference stolen here: */
PyTuple_SetItem(pArgs, i, pValue);
}
pValue = PyObject_CallObject(pFunc, pArgs);
Py_DECREF(pArgs);
if (pValue != NULL) {
printf("Result of call: %ld\n", PyLong_AsLong(pValue));
Py_DECREF(pValue);
}
else {
Py_DECREF(pFunc);
Py_DECREF(pModule);
PyErr_Print();
fprintf(stderr,"Call failed\n");
return 1;
}
}
else {
if (PyErr_Occurred())
PyErr_Print();
fprintf(stderr, "Cannot find function \"%s\"\n", argv[2]);
}
Py_XDECREF(pFunc);
Py_DECREF(pModule);
}
else {
PyErr_Print();
fprintf(stderr, "Failed to load \"%s\"\n", argv[1]);
std::ifstream ifs;
ifs.exceptions(std::ifstream::failbit | std::ifstream::badbit);
ifs.open(argv[1]);
while (ifs.good() && !ifs.eof())
{
std::string line;
std::getline(ifs, line);
std::cout << line << "\n";
}
return 1;
}
Py_Finalize();
return 0;
}
build file (sconstruct):
env = Environment()
env.Append(CCFLAGS = ['-I/usr/include/python3.3m'])
env.Append(LIBS = ['pthread', 'dl', 'util', 'm', 'python3.3m'])
env.Program("call", ['python_em_01.cpp'])
All on ubuntu 13.04 64bit. result from terminal:
$ ./call test.py multiply 3 2
sys.argv: ['./call', 'test.py', 'multiply', '3', '2']
cwd: /home/leo/workspace_kepler/python_em_01
sys.path: ['/home/leo/workspace_kepler/python_em_01', '/usr/local/lib/python3.3/dist-packages/Cython-0.19.1-py3.3-linux-x86_64.egg', '/usr/lib/python3.3', '/usr/lib/python3.3/plat-x86_64-linux-gnu', '/usr/lib/python3.3/lib-dynload', '/usr/local/lib/python3.3/dist-packages', '/usr/lib/python3/dist-packages', '/home/leo/workspace_kepler/python_em_01', '.']
Traceback (most recent call last):
File "<frozen importlib._bootstrap>", line 1518, in _find_and_load_unlocked
AttributeError: 'module' object has no attribute '__path__'
During handling of the above exception, another exception occurred:
ImportError: No module named 'test.py'; test is not a package
Failed to load "test.py"
def multiply(a,b):
print("Will compute", a, "times", b)
c = 0
for i in range(0, a):
c = c + b
return c
all files in one directory with test.py file. Please Help.
