empty handlers in logger initialization

csst_common/logger.py

@@ -42,6 +42,9 @@ def get_logger(name="CSST L1 Pipeline", filename=""):
     """
     # initialize logger
     logger = logging.getLogger(name=name)
+    # empty handlers
+    logger.handlers = []
+    # set level
     logger.setLevel(logging.DEBUG)
 
     # logging formatter