Improve documentation of MysqlRed.flush()

mysqlred.py

@@ -89,14 +89,19 @@ class MysqlRed:
         
         # Execute insert query
         if cls._cached_insert_data:
-            print( cls._cached_insert_data )
-            cursor.executemany( cls._insert_query, ( cls._cached_insert_data[ key ] for key in cls._cached_insert_data ) )
+            # Since cls._cached_insert_data is a dict, we need to have a custom
+            # Generator to iterate over it
+            cursor.executemany( cls._insert_query,
+                                ( cls._cached_insert_data[ key ]
+                                  for key in cls._cached_insert_data ) )
+            # Reset after writing
             cls._cached_insert_data = {}
         
         # Execute update query
         # Use executemany since update could not be reduced to one query
         if cls._cached_update_data:
             cursor.executemany( cls._update_query, cls._cached_update_data )
+            # Reset after writing
             cls._cached_update_data = []
         
         # Commit db changes