Update app.py

app.py

@@ -137,21 +137,22 @@ def chat_with_musician(user_input, history, artist):
         return f"Error: {str(e)}"
     
     lyric_response = artist_response(gemma_response, artist)
-    if lyric_response == messages[-2]["content"]:
-        # If the response is the same as the last one, get a new one:
-        messages[-1]={"role": "user", "content": system_message_repeated + "\n\n" + user_input}
-        try:
-            response = client.chat_completion(
-                messages=messages,
-                model="google/gemma-2-2b-it",
-                max_tokens=256,
-                temperature=0.75,
-                #top_p=0.9
-            )
-            gemma_response= response["choices"][0]["message"]["content"]
-        except Exception as e:
-            return f"Error: {str(e)}"
-    lyric_response = artist_response(gemma_response, artist)
+    if len(messages)>1:
+        if lyric_response == messages[-2]["content"]:
+            # If the response is the same as the last one, get a new one:
+            messages[-1]={"role": "user", "content": system_message_repeated + "\n\n" + user_input}
+            try:
+                response = client.chat_completion(
+                    messages=messages,
+                    model="google/gemma-2-2b-it",
+                    max_tokens=256,
+                    temperature=0.75,
+                    #top_p=0.9
+                )
+                gemma_response= response["choices"][0]["message"]["content"]
+            except Exception as e:
+                return f"Error: {str(e)}"
+        lyric_response = artist_response(gemma_response, artist)
 
     history.append({"role": "user", "content": user_input})
     history.append({"role": "assistant", "content": lyric_response})