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bpo-44024: Improve the TypeError message in getattr and hasattr (GH-25863)

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Use common error message for non-string attribute name in the builtin
functions getattr and hasattr.
The special check no longer needed since Python 3.0.
This commit is contained in:
Géry Ogam 2022-01-18 21:46:26 +01:00 • committed by GitHub
parent 60ceedbdd5
commit 16bf9bd157
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GPG key ID: 4AEE18F83AFDEB23
3 changed files with 16 additions and 14 deletions
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18
Lib/test/test_builtin.py
View file

@ -509,6 +509,9 @@ def test_delattr(self):
sys.spam = 1
delattr(sys, 'spam')
self.assertRaises(TypeError, delattr)
self.assertRaises(TypeError, delattr, sys)
msg = r"^attribute name must be string, not 'int'$"
self.assertRaisesRegex(TypeError, msg, delattr, sys, 1)
def test_dir(self):
# dir(wrong number of arguments)
@ -801,17 +804,21 @@ def test_filter_pickle(self):
def test_getattr(self):
self.assertTrue(getattr(sys, 'stdout') is sys.stdout)
self.assertRaises(TypeError, getattr, sys, 1)
self.assertRaises(TypeError, getattr, sys, 1, "foo")
self.assertRaises(TypeError, getattr)
self.assertRaises(TypeError, getattr, sys)
msg = r"^attribute name must be string, not 'int'$"
self.assertRaisesRegex(TypeError, msg, getattr, sys, 1)
self.assertRaisesRegex(TypeError, msg, getattr, sys, 1, 'spam')
self.assertRaises(AttributeError, getattr, sys, chr(sys.maxunicode))
# unicode surrogates are not encodable to the default encoding (utf8)
self.assertRaises(AttributeError, getattr, 1, "\uDAD1\uD51E")
def test_hasattr(self):
self.assertTrue(hasattr(sys, 'stdout'))
self.assertRaises(TypeError, hasattr, sys, 1)
self.assertRaises(TypeError, hasattr)
self.assertRaises(TypeError, hasattr, sys)
msg = r"^attribute name must be string, not 'int'$"
self.assertRaisesRegex(TypeError, msg, hasattr, sys, 1)
self.assertEqual(False, hasattr(sys, chr(sys.maxunicode)))
# Check that hasattr propagates all exceptions outside of
@ -1457,8 +1464,11 @@ def test_bug_27936(self):
def test_setattr(self):
setattr(sys, 'spam', 1)
self.assertEqual(sys.spam, 1)
self.assertRaises(TypeError, setattr, sys, 1, 'spam')
self.assertRaises(TypeError, setattr)
self.assertRaises(TypeError, setattr, sys)
self.assertRaises(TypeError, setattr, sys, 'spam')
msg = r"^attribute name must be string, not 'int'$"
self.assertRaisesRegex(TypeError, msg, setattr, sys, 1, 'spam')
# test_str(): see test_unicode.py and test_bytes.py for str() tests.

2
Misc/NEWS.d/next/Core and Builtins/2021-05-04-21-55-49.bpo-44024.M9m8Qd.rst Normal file
View file

@ -0,0 +1,2 @@
Improve the exc:`TypeError` message for non-string second arguments passed to
the built-in functions :func:`getattr` and :func:`hasattr`. Patch by Géry Ogam.

10
Python/bltinmodule.c
View file

@ -1091,11 +1091,6 @@ builtin_getattr(PyObject *self, PyObject *const *args, Py_ssize_t nargs)
v = args[0];
name = args[1];
if (!PyUnicode_Check(name)) {
PyErr_SetString(PyExc_TypeError,
"getattr(): attribute name must be string");
return NULL;
}
if (nargs > 2) {
if (_PyObject_LookupAttr(v, name, &result) == 0) {
PyObject *dflt = args[2];
@ -1156,11 +1151,6 @@ builtin_hasattr_impl(PyObject *module, PyObject *obj, PyObject *name)
{
PyObject *v;
if (!PyUnicode_Check(name)) {
PyErr_SetString(PyExc_TypeError,
"hasattr(): attribute name must be string");
return NULL;
}
if (_PyObject_LookupAttr(obj, name, &v) < 0) {
return NULL;
}