flask bokeh gunicorn:模型必须由单个文档拥有

下面是一个代码,用于运行flask应用程序和bokeh服务器,灵感来自 flask_gunicorn_embed.py on Github .

起初,它的工作方式很有魅力;但是,刷新页面后,就会出现此错误。

模型只能由单个文档拥有:…(剩余部分被截断)

顺便说一下,代码是用 gunicorn .
也, create_figure() 函数返回 layout

from Decision_Tree.Plot.decision_tree import create_figure
if __name__ == '__main__':
    import sys
    sys.exit()

app = Flask(__name__)


def modify_doc(doc):
    # Create the plot
    plot = create_figure()
    # Embed plot into HTML via Flask Render
    doc.add_root(plot)

bkapp = Application(FunctionHandler(modify_doc))

# This is so that if this app is run using something like "gunicorn -w 4" then
# each process will listen on its own port
sockets, port = bind_sockets("x.x.x.x", 0)


@app.route('/', methods=['GET'])
def bkapp_page():
    script = server_document('http://x.x.x.x:%d/bkapp' % port)
    return render_template("index.html", script=script, template="Flask")


def bk_worker():
    asyncio.set_event_loop(asyncio.new_event_loop())

    bokeh_tornado = BokehTornado({'/bkapp': bkapp}, extra_websocket_origins=["x.x.x.x:5000"])
    bokeh_http = HTTPServer(bokeh_tornado)
    bokeh_http.add_sockets(sockets)

    server = BaseServer(IOLoop.current(), bokeh_tornado, bokeh_http)
    server.start()
    server.io_loop.start()


from threading import Thread
Thread(target=bk_worker).start()

期待任何帮助! P.S.域有意替换为X.X.X.X。