From 56db3c67e7f6493c8f3544907613c1162d1dce39 Mon Sep 17 00:00:00 2001
From: allegroai <>
Date: Fri, 30 Oct 2020 09:49:18 +0200
Subject: [PATCH] Use deepcopy since Python's logging infrastructure might
 modify the dict

---
 trains/backend_config/log.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/trains/backend_config/log.py b/trains/backend_config/log.py
index 97b373c9..6dad47bc 100644
--- a/trains/backend_config/log.py
+++ b/trains/backend_config/log.py
@@ -1,4 +1,5 @@
 import logging.config
+from copy import deepcopy
 
 from pathlib2 import Path
 
@@ -27,4 +28,5 @@ def initialize(logging_config=None, extra=None):
         Logger.manager.loggerClass = _Logger
 
     if logging_config is not None:
-        logging.config.dictConfig(dict(logging_config))
+        # Use deepcopy since Python's logging infrastructure might modify the dict
+        logging.config.dictConfig(deepcopy(dict(logging_config)))