Use user's polar dir

my/common.py

@@ -76,3 +76,17 @@ def listify(fn=None, wrapper=list):
 #     def md(it):
 #         return make_dict(it, key=key, value=value)
 #     return listify(fn=fn, wrapper=md)
+
+
+def setup_logger(logger, level=None, format=None, datefmt=None):
+    import logging
+    old_root = logging.root
+    try:
+        logging.root = logger
+        logging.basicConfig(
+            level=level or logging.DEBUG,
+            format=format or '%(name)s %(asctime)s %(levelname)-8s %(filename)s:%(lineno)-4d %(message)s',
+            datefmt=datefmt or '%Y-%m-%d %H:%M:%S',
+        )
+    finally:
+        logging.root = old_root