Address code review comments in atexit tests

Author: benjaminJohnson2204

Lib/test/_test_atexit.py

@@ -137,7 +137,6 @@ def func():
 
     def test_eq_unregister_clear(self):
         # Issue #112127: callback's __eq__ may call unregister or _clear
-        global cnt
         cnt = 0
         class Func:
             def __init__(self, action, eq_ret_val):
@@ -148,26 +147,20 @@ def __call__(self):
                 return
 
             def __eq__(self, o):
-                global cnt
                 cnt += 1
                 if cnt == 1:
                     self.action(o)
                 return self.eq_ret_val(o)
 
-        for action, eq_ret_val in (
-            (lambda o: atexit.unregister(self), lambda o: NotImplemented),
-            (lambda o: atexit.unregister(self), lambda o: True),
-            (lambda o: atexit.unregister(o),    lambda o: NotImplemented),
-            (lambda o: atexit.unregister(o),    lambda o: True),
-            (lambda o: atexit._clear(),         lambda o: NotImplemented),
-            (lambda o: atexit._clear(),         lambda o: True),
-        ):
-            cnt = 0
-            f1 = Func(action, eq_ret_val)
-            f2 = Func(action, eq_ret_val)
-            atexit.register(f1)
-            atexit.register(f2)
-            atexit._run_exitfuncs()
+        for action in lambda o: atexit.unregister(self), lambda o: atexit.unregister(o), lambda o: atexit._clear():
+            for eq_ret_val in NotImplemented, True: 
+                with self.subTest(action=action, eq_ret_val=eq_ret_val):
+                    cnt = 0
+                    f1 = Func(action, eq_ret_val)
+                    f2 = Func(action, eq_ret_val)
+                    atexit.register(f1)
+                    atexit.register(f2)
+                    atexit._run_exitfuncs()
 
 
 if __name__ == "__main__":