[python][gradio]gr.State用法

云未归来

发布于 2025-07-20 11:25:26

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gr.State是一个不可见的控件，目的是在后台存储一些变量方便访问和交互。

官方说明：

特殊的隐藏组件，用于存储同一用户运行演示时的会话状态。当用户刷新页面时，State 变量的值被清除。

实例：

import gradio as gr

demo = gr.Blocks(css="""#btn {color: red} .abc {font-family: "Comic Sans MS", "Comic Sans", cursive !important}""")

with demo:
    default_json = {"a": "a"}

    num = gr.State(value=0)
    squared = gr.Number(value=0)
    btn = gr.Button("Next Square", elem_id="btn", elem_classes=["abc", "def"])

    stats = gr.State(value=default_json)
    table = gr.JSON()

    def increase(var, stats_history):
        var += 1
        stats_history[str(var)] = var**2
        return var, var**2, stats_history, stats_history

    btn.click(increase, [num, stats], [num, squared, stats, table])

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

界面连续点击三次：