app.py

import gradio as gr

def pri(df):
    print(len(df))
    for i in range(len(df)):
        print(df[i])
    for item in df:
        print(item)


with gr.Blocks() as demo:
    df = gr.Dataframe(
            headers=["name"],
            datatype=["str"],
            row_count=(4, "fixed"),
            col_count=(1, "fixed"))
    btn = gr.Button()
    btn.click(pri, df)

demo.launch()