Le 23/04/19 à 19:23, Chris Angelico a écrit :
On Wed, Apr 24, 2019 at 3:18 AM Vincent Vande Vyvre
<vincent.vande.vy...@telenet.be> wrote:
Hi,
In a CPython lib I have an _init() method wich take one argument, a file
name.
char *fname;
if (!PyArg_ParseTuple(args, "s", &fname))
return NULL;
So, if I instanciate my object with a bad argument I've a good error
message:
tif = ImgProc(123)
TypeError: argument 1 must be str, not int
(followed by the traceback)
But if I do:
try:
tif = ImgProc(123)
except Exception as why:
print("Error:", why)
I get just:
Error: <class '_liboqapy.ImgProc'> returned a result with an error set
It looks like there's an internal problem in the C function. Are you
sure it's hitting the PyArg_ParseTuple and then immediately returning
NULL? Post a bit more of your code; this error looks like something is
leaving an error state but then carrying on with the code.
ChrisA
Into the lib:
static int
ImgProc_init(ImgProc *self, PyObject *args, PyObject *kwds)
{
PyObject *tmp;
char *fname;
if (!PyArg_ParseTuple(args, "s", &fname))
return NULL;
tmp = self->src;
self->src = PyUnicode_FromString(fname);
Py_XDECREF(tmp);
return 0;
}
If i do:
try:
tif = ImgProc(123)
except Exception as why:
print(sys.exc_info())
raise
I get:
(<class 'SystemError'>, SystemError("<class '_liboqapy.ImgProc'>
returned a result with an error set",), <traceback object at
0x7f3bcac748c8>)
TypeError: argument 1 must be str, not int
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
File "/home/vincent/oqapy-3/trunk/filters/ui_lenscorrection.py", line
104, in on_main_cursor_changed
self.prepare_preview_process()
File "/home/vincent/oqapy-3/trunk/filters/ui_lenscorrection.py", line
137, in prepare_preview_process
self.main.process_on_preview(params)
File "/home/vincent/oqapy-3/trunk/filters/lenscorrection.py", line
56, in process_on_preview
tif = ImgProc(123)
SystemError: <class '_liboqapy.ImgProc'> returned a result with an error set
--------------------------------------------------------------------------------
Why a SystemError ?
I'm using Python 3.6.7 and 3.7.3
Vincent
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