[Python-checkins] bpo-46557: Log captured warnings without format string (GH-30975)

[vsajip]

https://github.com/python/cpython/commit/d8066b420b888591f485d132e62979d07abfc3f4
commit: d8066b420b888591f485d132e62979d07abfc3f4
branch: main
author: Michael P. Nitowski <mpnitowski at gmail.com>
committer: vsajip <vinay_sajip at yahoo.co.uk>
date: 2022-03-15T09:01:03Z
summary:

bpo-46557: Log captured warnings without format string (GH-30975)

files:
A Misc/NEWS.d/next/Library/2022-01-28-01-23-25.bpo-46557.XSbhyQ.rst
M Lib/logging/__init__.py

diff --git a/Lib/logging/__init__.py b/Lib/logging/__init__.py
index e49e0d02a80cf..160b1afcee0f9 100644
--- a/Lib/logging/__init__.py
+++ b/Lib/logging/__init__.py
@@ -2246,7 +2246,9 @@ def _showwarning(message, category, filename, lineno, file=None, line=None):
         logger = getLogger("py.warnings")
         if not logger.handlers:
             logger.addHandler(NullHandler())
-        logger.warning("%s", s)
+        # bpo-46557: Log str(s) as msg instead of logger.warning("%s", s)
+        # since some log aggregation tools group logs by the msg arg
+        logger.warning(str(s))
 
 def captureWarnings(capture):
     """
diff --git a/Misc/NEWS.d/next/Library/2022-01-28-01-23-25.bpo-46557.XSbhyQ.rst b/Misc/NEWS.d/next/Library/2022-01-28-01-23-25.bpo-46557.XSbhyQ.rst
new file mode 100644
index 0000000000000..dd7d3f3d6c51f
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2022-01-28-01-23-25.bpo-46557.XSbhyQ.rst
@@ -0,0 +1 @@
+Warnings captured by the logging module are now logged without a format string to prevent systems that group logs by the msg argument from grouping captured warnings together.