[Python-Dev] PyExc_UnicodeDecodeError (original) (raw)

M.-A. Lemburg mal at egenix.com
Wed Sep 15 17:35:36 CEST 2004

Thomas Heller wrote:

Can anyone explain why calling this code in a C extension

static PyObject * test(PyObject *self, PyObject *arg) { PyErrSetString(PyExcUnicodeDecodeError, "blah blah"); return NULL; } PyMethodDef modulemethods[] = { {"test", test, METHNOARGS}, {NULL, NULL} };

does this (same in 2.3.4, and 2.4 current CVS):

from somewhere import test test() Traceback (most recent call last): File "", line 1, in ? TypeError: function takes exactly 5 arguments (1 given)

See Python/exceptions.c:

PyObject * PyUnicodeDecodeError_Create( const char *encoding, const char *object, int length, int start, int end, const char *reason) { return PyObject_CallFunction(PyExc_UnicodeDecodeError, "ss#iis", encoding, object, length, start, end, reason); }

This exception is thrown by codecs that want to signal a decoding error. It includes the context of the problem as well as the reason string.

-- Marc-Andre Lemburg eGenix.com

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