在Dash Python中更新图形单击时的视频源

pip install dash

import dash
import dash_core_components as dcc
import dash_html_components as html
from dash.dependencies import Input, Output

app = dash.Dash(__name__)

app.layout = html.Div([
    html.H1("视频播放器"),
    html.Video(id="video-player", controls=True),
    html.Button("更新视频源", id="update-button"),
])

@app.callback(
    Output("video-player", "src"),
    [Input("update-button", "n_clicks")]
)
def update_video_source(n_clicks):
    if n_clicks is None:
        return dash.no_update
    else:
        # 在这里更新视频源的URL
        video_url = "https://example.com/video.mp4"
        return video_url

if __name__ == '__main__':
    app.run_server(debug=True)