Fredrik Lundh wrote:
> [EMAIL PROTECTED] 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.
--
http://mail.python.org/mailman/listinfo/python-list
