From e8919e54ece04e8b6007a74dd713e48517c4a925 Mon Sep 17 00:00:00 2001
From: Matt Sayler <sayler@thewalrus.org>
Date: Mon, 5 Oct 2020 08:50:45 -0500
Subject: [PATCH] Don't duplicate logger hander (#86)

---
 almdrlib/__init__.py | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/almdrlib/__init__.py b/almdrlib/__init__.py
index 9728128..fd6dc44 100644
--- a/almdrlib/__init__.py
+++ b/almdrlib/__init__.py
@@ -36,7 +36,10 @@ def set_logger(name='almdrlib', level=logging.DEBUG, format_string=None):
     handler.setLevel(level)
     formatter = logging.Formatter(format_string)
     handler.setFormatter(formatter)
-    logger.addHandler(handler)
+
+    # avoid duplicate logs if already set by caller, etc.
+    if not logger.handlers:
+        logger.addHandler(handler)
 
 
 def _get_default_session():