Quit if no data was found

voedingscentrum.py

@@ -117,12 +117,13 @@ DATABASE = {'host': args.dbhost,
 DATE_FROM = parse_date(args.from_date) if args.from_date else date.today()
 DATE_TO = parse_date(args.to_date) if args.to_date else date.today()
 
-conn = psycopg2.connect(**DATABASE)
-cursor = conn.cursor()
 data = download_data()
+if not data:
+    quit(0)
 
-if data:
-    cursor.execute(f"DELETE FROM consumpties_{args.dbuser} WHERE datum BETWEEN %s AND %s", (DATE_FROM, DATE_TO))
+conn = psycopg2.connect(**DATABASE)
+cursor = conn.cursor()
+cursor.execute(f"DELETE FROM consumpties_{args.dbuser} WHERE datum BETWEEN %s AND %s", (DATE_FROM, DATE_TO))
 
 for product, consumptie in extract_consumpties(data):
     insert_product(cursor, **product)