Update app.py

app.py

@@ -1,22 +1,32 @@
-from smolagents import CodeAgent,DuckDuckGoSearchTool, HfApiModel,load_tool,tool
+from smolagents import CodeAgent, HfApiModel,load_tool,tool
 import datetime
 import requests
 import pytz
 import yaml
 from tools.final_answer import FinalAnswerTool
+from tools.web_search import DuckDuckGoSearchTool
+from tools.visit_webpage import VisitWebpageTool
 
 from Gradio_UI import GradioUI
 
 # Below is an example of a tool that does nothing. Amaze us with your creativity !
 @tool
-def my_custom_tool(arg1:str, arg2:int)-> str: #it's import to specify the return type
-    #Keep this format for the description / args / args description but feel free to modify the tool
-    """A tool that does nothing yet 
+def my_custom_tool(expr:str)-> str: #it's import to specify the return type
+    """Evaluate a simple mathematical expression
     Args:
-        arg1: the first argument
-        arg2: the second argument
+        expr: the full mathematical expression as a string" 
     """
-    return "What magic will you build ?"
+    try:
+        res = eval(arg1)
+    
+    except SyntaxError as se:
+        raise SystemError
+            (f"Error: Invalid Syntax in the expression {se}") from se
+    except Exception as e:
+        raise Exception
+            ("Error: evaluatiopn failed with error {e}") from e
+        
+    return str(res)
 
 @tool
 def get_current_time_in_timezone(timezone: str) -> str: