Closes #28524: added default level for logging.disable().

2 files changed, 6 insertions, 1 deletions

diff --git a/Lib/logging/__init__.py b/Lib/logging/__init__.py
index 2590d6528f..d886d35c12 100644
--- a/Lib/logging/__init__.py
+++ b/Lib/logging/__init__.py
@@ -1889,7 +1889,7 @@ def log(level, msg, *args, **kwargs):
         basicConfig()
     root.log(level, msg, *args, **kwargs)
 
-def disable(level):
+def disable(level=CRITICAL):
     """
     Disable all logging calls of severity 'level' and below.
     """
diff --git a/Lib/test/test_logging.py b/Lib/test/test_logging.py
index 08cdd7f3eb..7c5d1fd63c 100644
--- a/Lib/test/test_logging.py
+++ b/Lib/test/test_logging.py
@@ -3473,6 +3473,11 @@ class ModuleLevelMiscTest(BaseTest):
         logging.disable(83)
         self.assertEqual(logging.root.manager.disable, 83)
 
+        # test the default value introduced in 3.7
+        # (Issue #28524)
+        logging.disable()
+        self.assertEqual(logging.root.manager.disable, logging.CRITICAL)
+
     def _test_log(self, method, level=None):
         called = []
         support.patch(self, logging, 'basicConfig',