#464 add_logger function in its original version

nansat/utils.py

@@ -16,7 +16,7 @@
 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 from __future__ import absolute_import
 
-import os
+import os, sys
 import warnings
 import logging
 from dateutil.parser import parse
@@ -196,13 +196,25 @@ def add_logger(logName='', logLevel=None):
     """
     if logLevel is not None:
         os.environ['LOG_LEVEL'] = str(logLevel)
-
+    # create (or take already existing) logger
+    # with default logging level WARNING
     logger = logging.getLogger(logName)
+    logger.setLevel(int(os.environ['LOG_LEVEL']))
 
+    # if logger already exits, default stream handler has been already added
+    # otherwise create and add a new handler
     if len(logger.handlers) == 0:
-        logger.addHandler(logging.NullHandler())
-        logger.handlers[0].setLevel(int(os.environ['LOG_LEVEL']))
-    logger.setLevel(int(os.environ['LOG_LEVEL']))
+        # create console handler and set level to debug
+        ch = logging.StreamHandler(sys.stdout)
+        # create formatter
+        formatter = logging.Formatter('%(asctime)s - %(name)s - %(threadName)s - '
+                                      '%(levelname)s - %(message)s')
+        # add formatter to ch
+        ch.setFormatter(formatter)
+        # add ch to logger
+        logger.addHandler(ch)
+
+    logger.handlers[0].setLevel(int(os.environ['LOG_LEVEL']))
 
     return logger