Update app.py

app.py

@@ -53,7 +53,7 @@ def predict(
         if 'choices' in json_response and len(json_response['choices']) > 0:
             assistant_content = json_response['choices'][0]['message']['content']            
             chat_history.append({"role": "assistant", "content": assistant_content})
-            stats_content = f"*Powered by Oxygen, Generation time: {json_response["usage"]["metrics"]["inference_time_ms"]} ms , Tokens per second: {json_response["usage"]["metrics"]["tokens_per_second"]} , Generation cost: {round(json_response["usage"]["cost"]["total"],10)} EUR*"
+            stats_content = f'*Powered by Oxygen, Generation time: {json_response["usage"]["metrics"]["inference_time_ms"]} ms , Tokens per second: {json_response["usage"]["metrics"]["tokens_per_second"]} , Generation cost: {round(json_response["usage"]["cost"]["total"],10)} EUR*'
         else:
             chat_history.append({"role": "assistant", "content": "Error: No response from assistant."})