Update app.py

Rewrote the execptions in one of the tools

app.py

@@ -39,14 +39,15 @@ def get_wikipedia_page_content(page_name: str) ->  str:
     Args:
         page_name: the name of the page in wikipedia
     """
+    s_error = ""
     try:
         a_page = wikipedia.page(page_name)
         return a_page.content
-    except (
-        self.wiki_client.exceptions.PageError,
-        self.wiki_client.exceptions.DisambiguationError,
-    ):
-        print ("An error occured")
+    except wikipedia.exceptions.PageError:
+        s_error = "PageError"
+    except wikipedia.exceptions.DisambiguationError:
+        s_error = "DisambiguationError"
+    print (f"An error occured {s_error}")
 
 final_answer = FinalAnswerTool()