Update app.py

app.py

@@ -1,32 +1,5 @@
 import gradio as gr
-from PIL import Image
-
-def grayscale_pipeline(prompt):  # keep signature the same at first!
-    # ignore prompt; just use a demo image or make a blank
-    img = Image.new('RGB', (256, 256), color='white')
-    gray = img.convert("L")
-    return gray, 42  # image, seed
-
-with gr.Blocks() as demo:
-    with gr.Column():
-        gr.Markdown(" # Grayscale Test Template")
-
-        with gr.Row():
-            prompt = gr.Text(label="Prompt")
-            run_button = gr.Button("Run")
-
-        result = gr.Image(label="Result")
-
-        gr.Examples(examples=["any"], inputs=[prompt])
-
-    gr.on(
-        triggers=[run_button.click, prompt.submit],
-        fn=grayscale_pipeline,
-        inputs=[prompt],
-        outputs=[result, gr.Number(label="Seed")],  # keep outputs shape
-    )
-
-if __name__ == "__main__":
-    demo.launch()
-
-
+def invert(img):
+    return 255 - img
+iface = gr.Interface(fn=invert, inputs=gr.Image(type="numpy"), outputs=gr.Image())
+iface.launch()