bpo-46411: Remove unnecessary calls to sys.exc_info() in tests (GH-30638)

(cherry picked from commit a287b31bcb065e4122400cb59167340d25480e6d)

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

6 files changed, 14 insertions, 16 deletions

diff --git a/Lib/test/test_argparse.py b/Lib/test/test_argparse.py
index c96a540a8b..37a73e0686 100644
--- a/Lib/test/test_argparse.py
+++ b/Lib/test/test_argparse.py
@@ -101,8 +101,8 @@ def stderr_to_parser_error(parse_args, *args, **kwargs):
                 if getattr(result, key) is sys.stderr:
                     setattr(result, key, old_stderr)
             return result
-        except SystemExit:
-            code = sys.exc_info()[1].code
+        except SystemExit as e:
+            code = e.code
             stdout = sys.stdout.getvalue()
             stderr = sys.stderr.getvalue()
             raise ArgumentParserError(
@@ -1830,8 +1830,7 @@ class TestActionUserDefined(ParserTestCase):
                     raise AssertionError('value: %s' % value)
                 assert expected_ns == namespace, ('expected %s, got %s' %
                                                   (expected_ns, namespace))
-            except AssertionError:
-                e = sys.exc_info()[1]
+            except AssertionError as e:
                 raise ArgumentParserError('opt_action failed: %s' % e)
             setattr(namespace, 'spam', value)
 
@@ -1856,8 +1855,7 @@ class TestActionUserDefined(ParserTestCase):
                     raise AssertionError('value: %s' % value)
                 assert expected_ns == namespace, ('expected %s, got %s' %
                                                   (expected_ns, namespace))
-            except AssertionError:
-                e = sys.exc_info()[1]
+            except AssertionError as e:
                 raise ArgumentParserError('arg_action failed: %s' % e)
             setattr(namespace, 'badger', value)
 
diff --git a/Lib/test/test_builtin.py b/Lib/test/test_builtin.py
index 7456803221..4b0b15f0a9 100644
--- a/Lib/test/test_builtin.py
+++ b/Lib/test/test_builtin.py
@@ -581,8 +581,8 @@ class BuiltinTest(unittest.TestCase):
         # dir(traceback)
         try:
             raise IndexError
-        except:
-            self.assertEqual(len(dir(sys.exc_info()[2])), 4)
+        except IndexError as e:
+            self.assertEqual(len(dir(e.__traceback__)), 4)
 
         # test that object has a __dir__()
         self.assertEqual(sorted([].__dir__()), dir([]))
diff --git a/Lib/test/test_inspect.py b/Lib/test/test_inspect.py
index 93ff2f85df..545dab5c63 100644
--- a/Lib/test/test_inspect.py
+++ b/Lib/test/test_inspect.py
@@ -132,8 +132,8 @@ class TestPredicates(IsTestBase):
         self.istest(inspect.iscode, 'mod.spam.__code__')
         try:
             1/0
-        except:
-            tb = sys.exc_info()[2]
+        except Exception as e:
+            tb = e.__traceback__
             self.istest(inspect.isframe, 'tb.tb_frame')
             self.istest(inspect.istraceback, 'tb')
             if hasattr(types, 'GetSetDescriptorType'):
diff --git a/Lib/test/test_logging.py b/Lib/test/test_logging.py
index 03d0319306..8212cf7a9a 100644
--- a/Lib/test/test_logging.py
+++ b/Lib/test/test_logging.py
@@ -5508,8 +5508,8 @@ for when, exp in (('S', 1),
                     print('currentSecond: %s' % currentSecond, file=sys.stderr)
                     print('r: %s' % r, file=sys.stderr)
                     print('result: %s' % result, file=sys.stderr)
-                except Exception:
-                    print('exception in diagnostic code: %s' % sys.exc_info()[1], file=sys.stderr)
+                except Exception as e:
+                    print('exception in diagnostic code: %s' % e, file=sys.stderr)
         self.assertEqual(exp, actual)
         rh.close()
     setattr(TimedRotatingFileHandlerTest, "test_compute_rollover_%s" % when, test_compute_rollover)
diff --git a/Lib/test/test_raise.py b/Lib/test/test_raise.py
index 8dc62a933e..8225504c47 100644
--- a/Lib/test/test_raise.py
+++ b/Lib/test/test_raise.py
@@ -12,8 +12,8 @@ import unittest
 def get_tb():
     try:
         raise OSError()
-    except:
-        return sys.exc_info()[2]
+    except OSError as e:
+        return e.__traceback__
 
 
 class Context:
diff --git a/Lib/test/test_zipimport.py b/Lib/test/test_zipimport.py
index 19d3a880f4..b291d53016 100644
--- a/Lib/test/test_zipimport.py
+++ b/Lib/test/test_zipimport.py
@@ -709,8 +709,8 @@ class UncompressedZipImportTestCase(ImportHooksBaseTestCase):
     def doTraceback(self, module):
         try:
             module.do_raise()
-        except:
-            tb = sys.exc_info()[2].tb_next
+        except Exception as e:
+            tb = e.__traceback__.tb_next
 
             f,lno,n,line = extract_tb(tb, 1)[0]
             self.assertEqual(line, raise_src.strip())