Index: squid-tagger.py
==================================================================
--- squid-tagger.py
+++ squid-tagger.py
@@ -355,17 +355,17 @@
 		csv_reader = csv.reader(sys.stdin)
 		first_row = next(csv_reader)
 
 		if config.options.load:
 			# loading database
-			assert first_row == data_fields, 'File must contain csv data with theese columns: ' + data_fields
+			assert first_row == data_fields, 'File must contain csv data with theese columns: ' + repr(data_fields)
 
 			tagdb.load(csv_reader)
 
 		elif config.options.load_conf:
 			# loading database
-			assert first_row == conf_fields, 'File must contain csv data with theese columns: ' + conf_fields
+			assert first_row == conf_fields, 'File must contain csv data with theese columns: ' + repr(conf_fields)
 
 			tagdb.load_conf(csv_reader)
 
 else:
 	# main loop