app.py

import gradio as gr


with gr.Blocks(css=".column-form .wrap {flex-direction: column;}") as demo:
    with gr.Row():
        with gr.Column(visible=True, min_width=200, scale=0) as sidebar:
            options = gr.Radio(["Llama", "Mistral", "Gemma"], label="Model", elem_classes="column-form")
            options2 = gr.CheckboxGroup(["Option 1", "Option 2", "Option 3"], label="Option Set 1", elem_classes="column-form")
        with gr.Column() as main:
            #open_sidebar_btn = gr.Button("Open Sidebar", scale=0)
            #close_sidebar_btn = gr.Button("Close Sidebar", visible=False, scale=0)
            #open_sidebar_btn.click(lambda: {
            #    open_sidebar_btn: gr.Button(visible=False),
            #    close_sidebar_btn: gr.Button(visible=True),
            #    sidebar: gr.Column(visible=True)
            #}, outputs={open_sidebar_btn, close_sidebar_btn, sidebar})
            #close_sidebar_btn.click(lambda: {
            #    open_sidebar_btn: gr.Button(visible=True),
            #    close_sidebar_btn: gr.Button(visible=False),
            #    sidebar: gr.Column(visible=False)
            #}, outputs={open_sidebar_btn, close_sidebar_btn, sidebar})
            #options.select(lambda x: gr.Markdown(value=Seleting the ))
            gr.Markdown("# Hello Blocks")
            gr.Markdown("## You can keep the Sidebar fixed")
            gr.Markdown("Lorem ipsum dolor sit amet, consectetur adipiscing elit. Nullam nec nulla nec nulla fermentum fermentum. Nullam nec nulla nec nulla fermentum fermentum.")

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