commit 1d5a7e5694bd9104f56f4f28357c2d13afd58a29
author Miss Islington (bot) <31488909+miss-islington@users.noreply.github.com> Wed Jan 01 12:06:52 2020 -0800
committer Vinay Sajip <vinay_sajip@yahoo.co.uk> Wed Jan 01 20:06:52 2020 +0000
tree 32aaf3367eddcbcfd6cc98e6da644b49e634ddfd
parent dad526eb36530186f625a2724c8835fe3df3c8c1

bpo-39142: Avoid converting namedtuple instances to ConvertingTuple. (GH-17773) (GH-17785)

(cherry picked from commit 46abfc1416ff8e450999611ef8f231ff871ab133)

Lib/logging/config.py

diff --git a/Lib/logging/config.py b/Lib/logging/config.py
index 9dd35e1..3cd5fea 100644
--- a/Lib/logging/config.py
+++ b/Lib/logging/config.py
@@ -447,7 +447,7 @@
             value = ConvertingList(value)
             value.configurator = self
         elif not isinstance(value, ConvertingTuple) and\
-                 isinstance(value, tuple):
+                 isinstance(value, tuple) and not hasattr(value, '_fields'):
             value = ConvertingTuple(value)
             value.configurator = self
         elif isinstance(value, str): # str for py3k