From b7e1b3bc250d5c72c3a8d74ab51f409a1793eb73 Mon Sep 17 00:00:00 2001
From: Vinay Sajip <vinay_sajip@yahoo.co.uk>
Date: Fri, 29 Oct 2021 13:25:30 +0100
Subject: [PATCH] bpo-45628: Check all parts of the suffix for an extension
 match.

---
 Lib/logging/handlers.py | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/Lib/logging/handlers.py b/Lib/logging/handlers.py
index b613bec1c42705..d42c48de5f0620 100644
--- a/Lib/logging/handlers.py
+++ b/Lib/logging/handlers.py
@@ -371,8 +371,13 @@ def getFilesToDelete(self):
         for fileName in fileNames:
             if fileName[:plen] == prefix:
                 suffix = fileName[plen:]
-                if self.extMatch.match(suffix):
-                    result.append(os.path.join(dirName, fileName))
+                # See bpo-45628: The date/time suffix could be anywhere in the
+                # filename
+                parts = suffix.split('.')
+                for part in parts:
+                    if self.extMatch.match(part):
+                        result.append(os.path.join(dirName, fileName))
+                        break
         if len(result) < self.backupCount:
             result = []
         else: