app.py

import gradio as gr

def generate(x):
    return [
        (f"abc ![](/file={x})", "def"),
        ("ghi", "jkl")        
    ]

with gr.Blocks() as demo:
    i = gr.Image(type="filepath")
    c = gr.Chatbot()
    i.change(generate, i, c)
    
demo.launch()