fix nonetype

main.py

@@ -336,18 +336,26 @@ def start():
 
     # Check if rules already exists
     old_rules = stream.get_rules().data
+    old_rules_values = []
+    if old_rules:
         old_rules_values = [rule.value for rule in old_rules]
+    need_changes = False
     # Same amount of rules
     if len(old_rules_values) == len(rules):
         for rule in rules:
             # Check if Twitter doesn't know the rule and change rules if needed
             if rule not in old_rules_values:
+                need_changes = True
+                break
+    else:
+        need_changes = True
+
+    if need_changes:
         # Clean old rules
         stream.delete_rules([rule.id for rule in old_rules])
 
         # Add new rules
         stream.add_rules([StreamRule(rule) for rule in rules])
-                break
 
     # Apply the filter
     stream.filter(threaded=True, tweet_fields="author_id")