commit 6b996d61c96222d959d043b9424e8125c0efbb27
author Miss Islington (bot) <31488909+miss-islington@users.noreply.github.com> Wed Sep 08 09:32:19 2021 -0700
committer GitHub <noreply@github.com> Wed Sep 08 18:32:19 2021 +0200
tree 2a6cbad4ec168b0c80c671db75d23c08cbd6239d
parent d41abe8970453716dbc6a3a898ac8fb01cbf6c6f

[3.10] bpo-45083: Include the exception class qualname when formatting an exception (GH-28119) (GH-28134)

Co-authored-by: Erlend Egeberg Aasland <erlend.aasland@innova.no>
(cherry picked from commit b4b6342848ec0459182a992151099252434cc619)

Co-authored-by: Irit Katriel <1055913+iritkatriel@users.noreply.github.com>

* Use a private version of _PyType_GetQualName

Co-authored-by: Łukasz Langa <lukasz@langa.pl>

Lib/test/test_traceback.py

diff --git a/Lib/test/test_traceback.py b/Lib/test/test_traceback.py
index 61d86a1..ee18383 100644
--- a/Lib/test/test_traceback.py
+++ b/Lib/test/test_traceback.py
@@ -781,6 +781,19 @@ def test_syntax_error_various_offsets(self):
                 exp = "\n".join(expected)
                 self.assertEqual(exp, err)
 
+    def test_format_exception_only_qualname(self):
+        class A:
+            class B:
+                class X(Exception):
+                    def __str__(self):
+                        return "I am X"
+                    pass
+        err = self.get_report(A.B.X())
+        str_value = 'I am X'
+        str_name = '.'.join([A.B.X.__module__, A.B.X.__qualname__])
+        exp = "%s: %s\n" % (str_name, str_value)
+        self.assertEqual(exp, err)
+
 
 class PyExcReportingTests(BaseExceptionReportingTests, unittest.TestCase):
     #