Update app.py

app.py

@@ -1,27 +1,45 @@
-import streamlit as st
+import gradio as gr
 
-# App title
-st.title("🧮 Simple Calculator")
+def calculator(num1: float, num2: float, operation: str) -> str:
+    """
+    Perform basic arithmetic operations:
+    - add: num1 + num2
+    - subtract: num1 - num2
+    - multiply: num1 * num2
+    - divide: num1 / num2 (with zero-check)
 
-# Input fields
-num1 = st.number_input("Enter first number", value=0.0)
-num2 = st.number_input("Enter second number", value=0.0)
+    Args:
+        num1: first number
+        num2: second number
+        operation: one of "add", "subtract", "multiply", "divide"
 
-# Operation selector
-operation = st.selectbox("Select operation", ["Add", "Subtract", "Multiply", "Divide"])
+    Returns:
+        The result as a float, or an error message string.
+    """
+    if operation == "add":
+        return str(num1 + num2)
+    elif operation == "subtract":
+        return str(num1 - num2)
+    elif operation == "multiply":
+        return str(num1 * num2)
+    elif operation == "divide":
+        if num2 == 0:
+            return "Error: Division by zero"
+        return str(num1 / num2)
+    else:
+        return f"Error: Unknown operation '{operation}'"
 
-# Calculate and display result
-if st.button("Calculate"):
-    if operation == "Add":
-        result = num1 + num2
-    elif operation == "Subtract":
-        result = num1 - num2
-    elif operation == "Multiply":
-        result = num1 * num2
-    elif operation == "Divide":
-        if num2 != 0:
-            result = num1 / num2
-        else:
-            result = "Error: Division by zero"
-    
-    st.success(f"Result: {result}")
+demo = gr.Interface(
+    fn=calculator,
+    inputs=[
+        gr.Number(value=0.0, label="First Number"),
+        gr.Number(value=0.0, label="Second Number"),
+        gr.Dropdown(["add", "subtract", "multiply", "divide"], label="Operation"),
+    ],
+    outputs=gr.Textbox(label="Result"),
+    title="🧮 Simple Calculator",
+    description="Enter two numbers and choose an operation."
+)
+
+if __name__ == "__main__":
+    demo.launch(mcp_server=True)