.. function:: hasattr(object, name)
- The arguments are an object and a string. The result is ``True`` if the string
- is the name of one of the object's attributes, ``False`` if not. (This is
- implemented by calling ``getattr(object, name)`` and seeing whether it raises an
- exception or not.)
+ The arguments are an object and a string. The result is ``True`` if the
+ string is the name of one of the object's attributes, ``False`` if not. (This
+ is implemented by calling ``getattr(object, name)`` and seeing whether it
+ raises an :exc:`AttributeError` or not.)
.. function:: hash(object)
self.assertRaises(TypeError, hasattr)
self.assertEqual(False, hasattr(sys, chr(sys.maxunicode)))
- # Check that hasattr allows SystemExit and KeyboardInterrupts by
+ # Check that hasattr propagates all exceptions outside of
+ # AttributeError.
class A:
def __getattr__(self, what):
- raise KeyboardInterrupt
- self.assertRaises(KeyboardInterrupt, hasattr, A(), "b")
+ raise SystemExit
+ self.assertRaises(SystemExit, hasattr, A(), "b")
class B:
def __getattr__(self, what):
- raise SystemExit
- self.assertRaises(SystemExit, hasattr, B(), "b")
+ raise ValueError
+ self.assertRaises(ValueError, hasattr, B(), "b")
def test_hash(self):
hash(None)
Barry Scott
Nick Seidenman
Žiga Seilnach
+Yury Selivanov
Fred Sells
Jiwon Seo
Roger D. Serwy
Core and Builtins
-----------------
+- Issue #9666: Only catch AttributeError in hasattr(). All other exceptions that
+ occur during attribute lookup are now propagated to the caller.
+
- Issue #8622: Add PYTHONFSENCODING environment variable to override the
filesystem encoding.
}
v = PyObject_GetAttr(v, name);
if (v == NULL) {
- if (!PyErr_ExceptionMatches(PyExc_Exception))
- return NULL;
- else {
+ if (PyErr_ExceptionMatches(PyExc_AttributeError)) {
PyErr_Clear();
- Py_INCREF(Py_False);
- return Py_False;
+ Py_RETURN_FALSE;
}
+ return NULL;
}
Py_DECREF(v);
- Py_INCREF(Py_True);
- return Py_True;
+ Py_RETURN_TRUE;
}
PyDoc_STRVAR(hasattr_doc,
"hasattr(object, name) -> bool\n\
\n\
Return whether the object has an attribute with the given name.\n\
-(This is done by calling getattr(object, name) and catching exceptions.)");
+(This is done by calling getattr(object, name) and catching AttributeError.)");
static PyObject *