Function PLy_create_exception

src/pl/plpython/plpy_plpymodule.c:226–250

* Create an exception object and add it to the module */

 * Create an exception object and add it to the module
 */
static PyObject *
PLy_create_exception(char *name, PyObject *base, PyObject *dict,
					 const char *modname, PyObject *mod)
{
	PyObject   *exc;

	exc = PyErr_NewException(name, base, dict);
	if (exc == NULL)
		PLy_elog(ERROR, NULL);

	/*
	 * PyModule_AddObject does not add a refcount to the object, for some odd
	 * reason; we must do that.
	 */
	Py_INCREF(exc);
	PyModule_AddObject(mod, modname, exc);

	/*
	 * The caller will also store a pointer to the exception object in some
	 * permanent variable, so add another ref to account for that.  This is
	 * probably excessively paranoid, but let's be sure.
	 */
	Py_INCREF(exc);
	return exc;
}

/*
 * Add all the autogenerated exceptions as subclasses of SPIError