app.py

import gradio as gr


from PIL import Image

def convert_to_grayscale(input_path):
    # Open the image file
    img =  Image.open(input_path) 
        # Convert the image to grayscale
    return img.convert('L')


iface = gr.Interface (fn = convert_to_grayscale, 
                      inputs= gr.Image (type='filepath'),
                      outputs= gr.Image())

iface.launch ()