Add calculator application files

backend.py

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+from fastapi import FastAPI
+from pydantic import BaseModel
+from typing import Union
+
+app = FastAPI()
+
+class CalculatorInput(BaseModel):
+    num1: float
+    num2: float
+    operation: str
+
+class CalculatorResponse(BaseModel):
+    result: float
+    operation: str
+
+@app.post("/calculate", response_model=CalculatorResponse)
+async def calculate(input_data: CalculatorInput):
+    result = 0.0
+    
+    if input_data.operation == "add":
+        result = input_data.num1 + input_data.num2
+    elif input_data.operation == "subtract":
+        result = input_data.num1 - input_data.num2
+    elif input_data.operation == "multiply":
+        result = input_data.num1 * input_data.num2
+    elif input_data.operation == "divide":
+        if input_data.num2 == 0:
+            raise ValueError("Cannot divide by zero")
+        result = input_data.num1 / input_data.num2
+    else:
+        raise ValueError("Invalid operation")
+    
+    return CalculatorResponse(result=result, operation=input_data.operation)
+
+if __name__ == "__main__":
+    import uvicorn
+    uvicorn.run(app, host="0.0.0.0", port=8000) 

frontend.py

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+import gradio as gr
+import requests
+
+def calculate(num1: float, num2: float, operation: str) -> str:
+    try:
+        response = requests.post(
+            "http://localhost:8000/calculate",
+            json={
+                "num1": num1,
+                "num2": num2,
+                "operation": operation
+            }
+        )
+        response.raise_for_status()
+        result = response.json()
+        return f"Result: {result['result']}"
+    except requests.exceptions.RequestException as e:
+        return f"Error: {str(e)}"
+
+# Create the Gradio interface
+with gr.Blocks(title="Calculator") as demo:
+    gr.Markdown("# Calculator")
+    with gr.Row():
+        num1 = gr.Number(label="First Number")
+        num2 = gr.Number(label="Second Number")
+    
+    with gr.Row():
+        operation = gr.Radio(
+            choices=["add", "subtract", "multiply", "divide"],
+            label="Operation",
+            value="add"
+        )
+    
+    with gr.Row():
+        calculate_btn = gr.Button("Calculate")
+        result = gr.Textbox(label="Result")
+    
+    calculate_btn.click(
+        fn=calculate,
+        inputs=[num1, num2, operation],
+        outputs=result
+    )
+
+if __name__ == "__main__":
+    demo.launch() 

requirements.txt

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+fastapi==0.104.1
+uvicorn==0.24.0
+pydantic==2.5.2
+gradio==4.12.0
+requests==2.31.0