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import gradio as gr

blocks = gr.Blocks()

with blocks as demo:
    subject = gr.Textbox(placeholder="subject")
    verb = gr.Radio(["ate", "loved", "hated"])
    object = gr.Textbox(placeholder="object")

    with gr.Row():
        btn = gr.Button("Create sentence.")
        reverse_btn = gr.Button("Reverse sentence.")
        foo_bar_btn = gr.Button("Append foo")
        reverse_then_to_the_server_btn = gr.Button(
            "Reverse sentence and send to server."
        )

    def sentence_maker(w1, w2, w3):
        return f"{w1} {w2} {w3}"

    output1 = gr.Textbox(label="output 1")
    output2 = gr.Textbox(label="verb")
    output3 = gr.Textbox(label="verb reversed")
    output4 = gr.Textbox(label="front end process and then send to backend")

    btn.click(sentence_maker, [subject, verb, object], output1)
    reverse_btn.click(
        None, [subject, verb, object], output2, js="(s, v, o) => o + ' ' + v + ' ' + s"
    )
    verb.change(lambda x: x, verb, output3, js="(x) => [...x].reverse().join('')")
    foo_bar_btn.click(None, [], subject, js="(x) => x + ' foo'")

    reverse_then_to_the_server_btn.click(
        sentence_maker,
        [subject, verb, object],
        output4,
        js="(s, v, o) => [s, v, o].map(x => [...x].reverse().join(''))",
    )

if __name__ == "__main__":
    demo.launch()