Update app.py

app.py

@@ -14,13 +14,14 @@ def set_default_passage():
     return sum
     
 def update_passage(passage_name):
-    try:
-    
-        sum = wikipedia.summary(wikipedia.search(passage_name)[0], sentences=2, auto_suggest=False)
+    sum = "Please specify your article theme differently"
+    if passage_name :
+        try:
+            sum = wikipedia.summary(wikipedia.search(passage_name)[0], sentences=2, auto_suggest=False)
         # print(sum, wikipedia.search(passage_name))
-        passage.value = sum
-    except:
-        sum = "Please specify your article theme differently"
+            passage.value = sum
+       except:
+            sum = "Please specify your article theme differently"
         
     return sum, "", gr.update(visible=False), gr.update(visible=False), gr.update(visible=False)