Karthikeyan Singaravelan <[email protected]> added the comment:
A unittest patch for this issue. This occurs in master and 3.8 too.
diff --git a/Lib/test/test_logging.py b/Lib/test/test_logging.py
index 50148dc2f2..30fd9ee37a 100644
--- a/Lib/test/test_logging.py
+++ b/Lib/test/test_logging.py
@@ -4172,6 +4172,27 @@ class ModuleLevelMiscTest(BaseTest):
logging.setLoggerClass(logging.Logger)
self.assertEqual(logging.getLoggerClass(), logging.Logger)
+ def test_subclass_logger_cache(self):
+
+ class MyLogger(logging.getLoggerClass()):
+ pass
+
+ logger = MyLogger('test')
+ stream = io.StringIO()
+ h = logging.StreamHandler(stream)
+ logger.addHandler(h)
+
+ logger.setLevel(logging.DEBUG)
+ logger.debug("hello")
+ self.assertEqual(stream.getvalue().strip(), "hello")
+
+ stream.truncate(0)
+ stream.seek(0)
+
+ logger.setLevel(logging.INFO)
+ logger.debug("hello")
+ self.assertEqual(stream.getvalue(), "")
+
@support.requires_type_collecting
def test_logging_at_shutdown(self):
# Issue #20037
----------
nosy: +xtreak
versions: +Python 3.8, Python 3.9
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<https://bugs.python.org/issue37258>
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