app.py

import gradio as gr


with gr.Blocks() as demo:
    with gr.Tab("Upload"):
        input1 = gr.Image(source="upload")
    with gr.Tab("Webcam"):
        input2 = gr.Image(source="webcam")

    button = gr.Button()
    output = gr.Image()

    button.click(lambda x: x, inputs=input1, outputs=output)


demo.launch()