Fredrik Lundh wrote:
mo************@gmail.com wrote:
But .... I'm suffering from serious scoping bugs. I hope someone here
can help me with them.
First of all, if I type in something like;
def f(x):
if x==1:
return x
else:
return x * f(x-1)
and then go
print f(5)
I get an error. It says 'global name 'f' is not defined'. So
recursion won't work because of some odd scoping bug.
looks like the globals are all messed up. it would help to see the
actual C code.
</F>
Thanks!
I initialize the interpreter like this:
static PyObject *glb, *loc;
void startPython() {
Py_Initialize();
loc = PyDict_New();
glb = PyDict_New();
PyDict_SetItemString (glb, "__builtins__", PyEval_GetBuiltins ());
Py_InitModule("myIO", myIOMethods);
...... other modules initialization ......
executeFromResource(IDR_STARTUP_PY);
....... other startup scripts ........
}
I pretty much do the same thing for executing text resources or for
interactive commands - (and get the same bug either way) - actual code
from executeFromResource follows ....
int executeFromResource(int nResourceID) {
PyObject * src, *exception, *value, *traceback, *object, *result;
......miscellaneous Win32 stuff to capture resource from ID
......and to strip out 0x0D characters and add NULL terminator.
......char * "no0x0D" points to executable Python text
......msg is something like <<resource #103>>
src = Py_CompileString(no0x0D, msg, Py_file_input);
free(no0x0D);
if (src != NULL) {
/* it compiled. run it! */
result = PyEval_EvalCode ((PyCodeObject *)src, glb, loc);
if (PyErr_Occurred()) PyErr_Print();
Py_XDECREF(result);
Py_XDECREF(src);
return 1;
}
/* report whatever error we got */
if (nResourceID != IDR_STARTUP_PY)
{
/* report it to the console */
PyErr_Print();
PyErr_Clear();
} else {
/* if startup script dies, we have no console */
PyErr_Fetch (&exception, &value, &traceback);
PyArg_ParseTuple (value, "sO", &msg, &object);
PyErr_Clear();
Py_XDECREF (exception);
Py_XDECREF(value);
Py_XDECREF(traceback);
outputLogDialog("Error in Python startup\r\n");
outputLogDialog(msg);
outputLogDialog("\r\n");
}
return 0;
}
I had figured that referencing PyObject * glb and * loc was sufficient
to provide proper variable scoping. Am I missing something here? I
must be.
