gh-102778: Add sys.last_exc, deprecate sys.last_type, sys.last_value,sys.last_traceback (#102779)

2 files changed, 12 insertions, 2 deletions

diff --git a/Lib/test/test_dis.py b/Lib/test/test_dis.py
index b77e3b0..fa1de1c 100644
--- a/Lib/test/test_dis.py
+++ b/Lib/test/test_dis.py
@@ -1027,6 +1027,10 @@ class DisTests(DisTestBase):
 
     def test_dis_none(self):
         try:
+            del sys.last_exc
+        except AttributeError:
+            pass
+        try:
             del sys.last_traceback
         except AttributeError:
             pass
@@ -1043,7 +1047,7 @@ class DisTests(DisTestBase):
             1/0
         except Exception as e:
             tb = e.__traceback__
-            sys.last_traceback = tb
+            sys.last_exc = e
 
         tb_dis = self.get_disassemble_as_string(tb.tb_frame.f_code, tb.tb_lasti)
         self.do_disassembly_test(None, tb_dis, True)
@@ -1901,6 +1905,10 @@ class TestFinderMethods(unittest.TestCase):
 class TestDisTraceback(DisTestBase):
     def setUp(self) -> None:
         try:  # We need to clean up existing tracebacks
+            del sys.last_exc
+        except AttributeError:
+            pass
+        try:  # We need to clean up existing tracebacks
             del sys.last_traceback
         except AttributeError:
             pass
diff --git a/Lib/test/test_ttk/test_extensions.py b/Lib/test/test_ttk/test_extensions.py
index 6135c49..d5e0697 100644
--- a/Lib/test/test_ttk/test_extensions.py
+++ b/Lib/test/test_ttk/test_extensions.py
@@ -45,7 +45,9 @@ class LabeledScaleTest(AbstractTkTest, unittest.TestCase):
         # value which causes the tracing callback to be called and then
         # it tries calling instance attributes not yet defined.
         ttk.LabeledScale(self.root, variable=myvar)
-        if hasattr(sys, 'last_type'):
+        if hasattr(sys, 'last_exc'):
+            self.assertNotEqual(type(sys.last_exc), tkinter.TclError)
+        elif hasattr(sys, 'last_type'):
             self.assertNotEqual(sys.last_type, tkinter.TclError)
 
     def test_initialization(self):