Update app.py

app.py

@@ -37,6 +37,13 @@ def init_app(api_key,
              diffusion_model,
              keyword_model,
              dtype):
+
+    try:
+        openai.api_key = api_key
+        openai.Model.list()
+    except Exception as e:
+        gr.Error(str(e))
+
     console_logs = StringIO()
     sys.stdout = console_logs
     model_class = model_class.replace(" ","").lower()
@@ -84,6 +91,9 @@ def run_simulation(topic,
                    image_tokens=[],
                    news_company="CNN",
                    text_model_name="gpt-3.5-turbo-0301"):
+    if topic == "":
+        gr.Error("Topic must not be empty")
+             
     console_logs = StringIO()
     sys.stdout = console_logs
     filename = topic.replace(" ", "-") + ".csv"