Create app.py

app.py

@@ -0,0 +1,41 @@
+# app.py
+
+from qiskit import Aer
+from qiskit.utils import QuantumInstance
+from qiskit.algorithms import Shor
+import gradio as gr
+
+# Function to run Shor's algorithm
+def run_shor(N):
+    try:
+        N = int(N)
+        if N % 2 == 0 or N <= 1:
+            return f"Please enter an odd integer > 1."
+        if N > 21:
+            return f"Too big! Factor small numbers like 15 or 21 for simulation."
+
+        # Use Aer simulator backend
+        backend = Aer.get_backend('aer_simulator')
+        quantum_instance = QuantumInstance(backend, shots=1024)
+
+        shor = Shor(quantum_instance=quantum_instance)
+        result = shor.factor(N)
+
+        if result.factors:
+            return f"Factors of {N} are: {result.factors}"
+        else:
+            return f"Failed to find factors. Try again!"
+    except Exception as e:
+        return str(e)
+
+# Gradio interface
+iface = gr.Interface(
+    fn=run_shor,
+    inputs=gr.Number(label="Enter an integer to factor"),
+    outputs=gr.Textbox(label="Result"),
+    title="Shor's Algorithm Demo",
+    description="A simple Qiskit + Gradio demo to factor integers using Shor's Algorithm. Runs on simulator, so keep N small (e.g., 15, 21)."
+)
+
+if __name__ == "__main__":
+    iface.launch()