Update app.py

app.py

@@ -9,20 +9,24 @@ from Gradio_UI import GradioUI
 
 # Below is an example of a tool that does nothing. Amaze us with your creativity !
 @tool
-def calculator(arg1: int, arg2: int) -> int:
+def calculator(operation: str) -> str:
     """
-    Performs addition of two numbers.
+    A simple calculator that evaluates a basic arithmetic operation given as a string.
 
     Args:
-        arg1 (int): The first operand.
-        arg2 (int): The second operand.
+        operation (str): A mathematical expression (e.g., '5 + 3', '10 - 2', '4 * 7', '20 / 5').
 
     Returns:
-        int: The sum of the two numbers.
-    """
-    return arg1 + arg2
-
+        str: The result of the calculation as a string.
 
+    Raises:
+        ValueError: If the operation is invalid or cannot be computed.
+    """
+    try:
+        result = eval(operation)
+        return str(result)
+    except Exception as e:
+        raise ValueError(f"Invalid operation: {operation}. Error: {str(e)}")
 
 @tool
 def get_current_time_in_timezone(timezone: str) -> str: