[db] when launching with cli, python complains about the global connection variable

pyheatpump/db.py

@@ -13,8 +13,8 @@ conn = None
 def connect():
     global conn
     if conn is None:
-        logger.info('Will connect to database {}'.format(
-            config['heatpump']['database']))
+        # logger.info('Will connect to database {}'.format(
+        #    config['heatpump']['database']))
         conn = sqlite3.connect(config['heatpump']['database'])
         conn.row_factory = sqlite3.Row
     return conn
@@ -33,7 +33,6 @@ def initialize(filename):
 
 
 def sql(query):
-    global conn
     if conn is None:
         connect()