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PEP 415: Implement suppression of __context__ display with an exception attribute

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This replaces the original PEP 409 implementation. See #14133.
This commit is contained in:
Benjamin Peterson 2012-05-14 22:09:31 -07:00
parent d91dc62379
commit d5a1c44455
12 changed files with 80 additions and 79 deletions
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23
Python/ceval.c
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@ -3572,23 +3572,26 @@ do_raise(PyObject *exc, PyObject *cause)
if (cause) {
PyObject *fixed_cause;
int result;
if (PyExceptionClass_Check(cause)) {
fixed_cause = PyObject_CallObject(cause, NULL);
if (fixed_cause == NULL)
goto raise_error;
Py_CLEAR(cause);
} else {
/* Let "exc.__cause__ = cause" handle all further checks */
fixed_cause = cause;
cause = NULL; /* Steal the reference */
Py_DECREF(cause);
}
/* We retain ownership of the reference to fixed_cause */
result = _PyException_SetCauseChecked(value, fixed_cause);
Py_DECREF(fixed_cause);
if (result < 0) {
else if (PyExceptionInstance_Check(cause)) {
fixed_cause = cause;
}
else if (cause == Py_None) {
Py_DECREF(cause);
fixed_cause = NULL;
}
else {
PyErr_SetString(PyExc_TypeError,
"exception causes must derive from "
"BaseException");
goto raise_error;
}
PyException_SetCause(value, fixed_cause);
}
PyErr_SetObject(type, value);

9
Python/pythonrun.c
View file

@ -1761,11 +1761,7 @@ print_exception_recursive(PyObject *f, PyObject *value, PyObject *seen)
else if (PyExceptionInstance_Check(value)) {
cause = PyException_GetCause(value);
context = PyException_GetContext(value);
if (cause && cause == Py_None) {
/* print neither cause nor context */
;
}
else if (cause) {
if (cause) {
res = PySet_Contains(seen, cause);
if (res == -1)
PyErr_Clear();
@ -1776,7 +1772,8 @@ print_exception_recursive(PyObject *f, PyObject *value, PyObject *seen)
cause_message, f);
}
}
else if (context) {
else if (context &&
!((PyBaseExceptionObject *)value)->suppress_context) {
res = PySet_Contains(seen, context);
if (res == -1)
PyErr_Clear();