Fix Interactive story counter

changelog/8086.bugfix.md

@@ -0,0 +1,3 @@
+Update `rasa/training/interactive.py` and add tests when opens file to read
+
+Fix the number of each interactive story generated does not update between executions of the rasa interactive command, because the counter used at `_write_stories_to_file function` does not recognize previous interactive stories generated.

rasa/core/training/interactive.py

@@ -816,20 +816,33 @@ def _write_stories_to_file(
     else:
         append_write = "w"  # make a new file if not
 
+    interactive_story_prefix = "interactive_story_"
+
+    try:
+        f = open(export_story_path, "r", encoding=rasa.shared.utils.io.DEFAULT_ENCODING)
+    except OSError:
+        interactive_story_counter = 1
+    else:
+        with f:
+            interactive_story_counter = (
+                sum(1 for s in f if interactive_story_prefix in s) + 1
+            )  # count the times string 'interactive story' occur in file
+
     with open(
         export_story_path, append_write, encoding=rasa.shared.utils.io.DEFAULT_ENCODING
     ) as f:
-        i = 1
+
         for conversation in sub_conversations:
             parsed_events = rasa.shared.core.events.deserialise_events(conversation)
             tracker = DialogueStateTracker.from_events(
-                f"interactive_story_{i}", evts=parsed_events, slots=domain.slots
+                f"{interactive_story_prefix}{interactive_story_counter}",
+                evts=parsed_events,
+                slots=domain.slots,
             )
 
             if any(
                 isinstance(event, UserUttered) for event in tracker.applied_events()
             ):
-                i += 1
                 f.write(
                     "\n"
                     + tracker.export_stories(